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Published: 1 January 1980
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A. W. Shafter, K. A. Misselt
Published: 20 June 2006
The Astrophysical Journal, Volume 644, pp 1104-1117; https://doi.org/10.1086/503764

Abstract:
Multicolor (BVRI) light curves of the eclipsing classical nova V Per are presented, and a total of twelve new eclipse timings are measured for the system. When combined with previous eclipse timings from the literature, these timings yield a revised ephemeris for the times of mid-eclipse given by HJD = 2,447,442.8260(1) + 0.107123474(3) E. The eclipse profiles are analyzed with a parameter-fitting model that assumes four sources of luminosity: a white dwarf primary star, a main-sequence secondary star, a flared accretion disk with a rim, and a bright spot at the intersection of the mass-transfer stream and the disk periphery. A matrix of model solutions are computed, covering an extensive range of plausible parameter values. The solution matrix is then explored to determine the optimum values for the fitting parameters and their associated errors. For models that treat the accretion disk as a flat structure without a rim, optimum fits require that the disk have a flat temperature profile. Although models with a truncated inner disk (R_in >> R_wd) result in a steeper temperature profile, steady-state models with a temperature profile characterized by T(r) propto r^{-3/4} are found only for models with a significant disk rim. A comparison of the observed brightness and color at mid-eclipse with the photometric properties of the best-fitting model suggests that V Per lies at a distance of ~ 1 kpc.Comment: Accepted for publication in The Astrophysical Journal. Thirty-nine pages, including 9 figures. V2 - updated to include additional references and related discussion to previous work overlooked in the original version, and to correct a typo in the ephemeris given in the V3 - Minor typos corrected. The paper is scheduled for the 20 June 2006 issue of the ApJ. V4 - An error in equation (9) has been corrected. The results presented in the paper were not affected, as all computations were made using the correct formulation of this equatio
Lee Homer, Paula Szkody, Bing Chen, Arne Henden, Gary Schmidt, Scott F. Anderson, Nicole M. Silvestri, J. Brinkmann
Published: 1 January 2006
The Astronomical Journal, Volume 131, pp 562-570; https://doi.org/10.1086/498346

Abstract:
We report follow-up XMM-Newton and ground-based optical observations of the unusual X-ray binary SDSS J102347.67+003841.2 (=FIRST J102347.6+003841), and a new candidate intermediate polar found in the Sloan Digital Sky Survey: SDSS J093249.57+472523.0. SDSS J1023 was observed in its low-state, with similar magnitude/color (V=17.4 and B=17.9), and smooth orbital modulation as seen in most previous observations. We further refine the ephemeris (for photometric minimum) to: HJD(TT)_min= 2453081.8546(3) + E* 0.198094(1) d. It is easily detected in X-rays at an unabsorbed flux (0.01-10.0 keV) of 5x10e-13 erg/cm^2/s. Fitting a variety of models we find that: (i) either a hot (kT>~15 keV) optically thin plasma emission model (bremsstrahlung or MEKAL) or a simple power law can provide adequate fits to the data; (ii) these models prefer a low column density ~10e19 cm^-2; (iii) a neutron star atmosphere plus power law model (as found for quiescent low-mass X-ray binaries) can also produce a good fit (for plausible distances), though only for a much higher column of about 4x10e20 cm^-2 and a very cool atmosphere kT<~50eV. These results support the case that SDSS J1023 is a transient LMXB, and indeed places it in the subclass of such systems whose quiescent X-ray emission is dominated by a hard power law component. Our optical photometry of SDSS J0932 reveals that it is an high inclination eclipsing system. Combined with its optical characteristics -- high excitation emission lines, and brightness, yielding a large F_X/F_opt ratio -- its highly absorbed X-ray spectrum argues that SDSS J0932 is a strong IP candidate. However, only more extensive optical photometry and a detection of its spin or spin-orbit beat frequency can confirm this classification. (abridged)Comment: 9 pages, 7 figures, accepted for publication in the Astronomical Journal (page formatting corrected
Mahmut Keskin, Sabri Gül, Osman Biçer, Zühal Gündüz, Sedat Behrem
Lalahan Hayvancılık Araştırma Enstitüsü Dergisi; https://doi.org/10.46897/lahaed.779729

Abstract:
En tr In this study, it was aimed to determine the performance of Awassi sheep and their lambs in different season within the scope of the national breeding project carried out in Gaziantep. For this purpose, a total of 23490 heads of ewes and its lambs reared in different herds and under natural conditions were used in Gaziantep. The study covers the period between 2014 and 2017. The preliminary descriptive statistics showed that 35.24% and 25.47% of the ewes gave birth in January and December, respectively. Furthermore, the lamb survival rate at the weaning age was calculated to be 97.54% in February and 97.52% in December. The highest and the lowest birth weights were detected as 4.2 ± 0.01 kg and 2.7 ± 0.09 kg in January and May, respectively (PIn this study, it was aimed to determine the performance of Awassi sheep and their lambs in different season within the scope of the national breeding project carried out in Gaziantep. For this purpose, a total of 23490 heads of ewes and its lambs reared in different herds and under natural conditions were used in Gaziantep. The study covers the period between 2014 and 2017. The preliminary descriptive statistics showed that 35.24% and 25.47% of the ewes gave birth in January and December, respectively. Furthermore, the lamb survival rate at the weaning age was calculated to be 97.54% in February and 97.52% in December. The highest and the lowest birth weights were detected as 4.2 ± 0.01 kg and 2.7 ± 0.09 kg in January and May, respectively (P Anahtar Kelimeler en tr Awassi, birth season, reproductive parameters, growth characteristics Awassi, birth season, reproductive, parameters, growth characteristics Kaynakça 1. Boujenane I (2012). Comparison of purebred and crossbred D’man ewes and their terminal-sired progeny under acceler- ated lambing. Small Ruminant Res 106: 41-46. 2. Boztepe S (2015). Koyun Yetiştiriciliği. (Selçuk Üniversitesi Basımevi 1. Baskı, Selçuklu- Konya). 3. Esen F, Bozkurt T (2001). Akkaraman ırkı koyunlarda flushing ve östrus senkronizasyonu uygulamasının döl verimi üzerine etkisi. Turk J Vet Anim Sci 25: 365-368. 4. Freaking BA, Leymaster KA, Young LD (2000). Evaluation of Dorset, Finnsheep, Romanov, Texel and Montadale breeds of sheep: I. Effects of ram breed on productivity of ewes of two crossbred populations. Journal of Anim Sci 78: 1422-1429. 5. Gül S, Keskin M (2010). Reproductive characteristics of Awassi ewes under Cornell Alternate Month Accelerated Lambing System. Ital J Anim Sci 9: 255-259. 6. Gül S, Örnek H (2018). Gaziantep ilinde küçükbaş hayvan yetiştiriciliğinin yapısal özellikleri: I. Koyun Yetiştiriciliği. Mus- tafa Kemal Üniversitesi Ziraat Fakültesi Dergisi, 23: 307-315. 7. Gündüz Z (2014). Kilis Koşullarında Geleneksel Koyun Yetiştiriciliği Sistemi İçerisinde Farklı Dönemlerde Doğan İvesi Erkek ve Dişi Kuzuların Gelişme ve Besi Performansı. Mustafa Kemal Üniversitesi Fen Bilimleri Enstitüsü Zootekni Anabilim Dalı, Yüksek Lisans Tezi, 49 sy. 8. Hamadeh SK, Barbour EK, Abi Said M, Daada K (1996). Repro- ductive performance of postpartum Awassi ewes under differ- ent lambing regimes. Small Ruminant Res 19: 149-154. 9. Hansen C, Shrestha JNB (2002). Consistency of genetic param- eters of productivity for ewes lambing in February, June and October under an 8 month breeding management. Small Ru- minant Res 44: 1-8. 10. Jenkinson CMC, Peterson SW, Mackenzie DDS, McDonald MF, McCutcheon SN (1995). Seasonal effects on birth weight in sheep are associated with changes in placental development. New Zeal J Agr Res 38: 337-345. 11. Kaymakçı M (2006). Keçi Yetiştiriciliği. (Meta Basım Matbaacılık Hizmetleri, Bornova, İzmir). 12. Kaymakçı M (2010). İleri Koyun Yetiştiriciliği. (Meta Basım Matbaacılık Hizmetleri, Bornova, İzmir). 13. Köyceğiz F, Emsen E, Diaz CAG, Kutluca M (2009). Effects of lambing season, lamb breed and ewe parity on production traits of fat tailed sheep and their lambs. J Anim Vet Adv 8: 195-198. 14. Kul S, Akcan A (2002). İvesi ve Ost-Friz x İvesi melez (F1) kuzu- larda büyüme, yaşama gücü ve bazı vücut ölçüleri. Uludag Uni J Fac Vet Med 21: 109-114. 15. Maud BA, Duffell SJ (1977). Lamb mortality in relation to pro- lificacy. Anim Prod 24: 158-159. 16. Mohammed SA, Razzaque MA (2016). Lifetime reproductive and lamb crop yields of fat-tailed Naeemi and imported bor- der Leicester Merino ewes in intensive system of production. Small Ruminant Res 144: 269-275. 17. Molik E, Misztal T, Romanowicz K, Weierzchos E (2007). De- pendence of the lactation duration and efficiency on the sea- son of lambing in relation to the prolactin and melatonin se- cretion in ewes. Livest Sci 107: 220-226. 18. Notter DR (2000). Effects of ewe age and season of lambing on prolificacy in us Targhee, Suffolk and Polypay sheep. Small Ruminant Res 38: 1-7. 19. Rosa HJD, Bryant MJ (2003). Seasonality of reproduction in sheep. Small Ruminant Res 48: 155-171. 20. SPSS (2013). IBM SPSS Statistics 21.0 for Windows. Armonk, NY. 21. Susic V, Pavic V, Mioc B, Stokovic I, Kabalin AE (2005). Seasonal variations in lamb birth weight and mortality. Veterinarski Arhiv 75: 375-381. 22. Şireli HD, Vural ME, Karataş A, Akça N, Koncagül S, Tekel N (2015). Birth and weaning weights of Awassi lambs raised in the GAP International Agricultural Research and Training Cen- ter. Ankara Üni Vet Fak Derg 62: 139-145. 23. Üstüner H, Oğan MM (2013). Main productive performance of Awassi Sheep in the central Anatolian region of Turkey. Turk J Vet Anim Sci 37: 271-276. 24. Yılmaz O, Denk H, Bayram D (2007). Effects of lambing season, sex and birth type on growth performance in Norduz lambs. Small Ruminant Res 68: 336-339. Ayrıntılar Birincil Dil en Konular Ziraat, Sütçülük ve Hayvan Bilimleri Yazarlar Yazar: Mahmut KESKİN Kurum: HATAY MUSTAFA KEMAL ÜNİVERSİTESİÜlke: Turkey Orcid: 0000-0001-6787-8190Yazar: Sabri GÜL Kurum: HATAY MUSTAFA KEMAL ÜNİVERSİTESİÜlke: Turkey Yazar: Osman BİÇER Kurum: HATAY MUSTAFA KEMAL ÜNİVERSİTESİÜlke: Turkey Yazar: Zühal GÜNDÜZ Kurum: HATAY MUSTAFA KEMAL ÜNİVERSİTESİÜlke: Turkey Yazar: Sedat BEHREM Kurum: T.C. TARIM VE ORMAN BAKANLIĞIÜlke: Turkey Tarihler Yayımlanma Tarihi : 12 Ağustos 2020 Kaynak Göster Bibtex @araştırma makalesi { lahaed779729, journal = {Lalahan Hayvancılık Araştırma Enstitüsü Dergisi}, issn = {1016-877X}, address = {Uluslararası Hayvancılık Araştırma ve Eğitim Merkezi Müdürlüğü Lalahan Mah. S. Sırrı İçöz Cad. Mamak/ANKARA (Ankara-Samsun Yolu 30. Km)}, publisher = {Uluslararası Hayvancılık Araştırma ve Eğitim Merkezi Müdürlüğü}, year = {2020}, pages = { - }, doi = {10.46897/lahaed.779729}, title = {Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep}, key = {cite}, author = {Gül, Sabri and Bi̇çer, Osman and Gündüz, Zühal and Behrem, Sedat} } APA Keski̇n, M , Gül, S , Bi̇çer, O , Gündüz, Z , Behrem, S . (2020). Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep . Lalahan Hayvancılık Araştırma Enstitüsü Dergisi , , . DOI: 10.46897/lahaed.779729 MLA Keski̇n, M , Gül, S , Bi̇çer, O , Gündüz, Z , Behrem, S . "Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep" . Lalahan Hayvancılık Araştırma Enstitüsü Dergisi (2020 ): Chicago Keski̇n, M , Gül, S , Bi̇çer, O , Gündüz, Z , Behrem, S . "Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep". Lalahan Hayvancılık Araştırma Enstitüsü Dergisi (2020 ): RIS TY - JOUR T1 - Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep AU - Mahmut Keski̇n , Sabri Gül , Osman Bi̇çer , Zühal Gündüz , Sedat Behrem Y1 - 2020 PY - 2020 N1 - doi: 10.46897/lahaed.779729 DO - 10.46897/lahaed.779729 T2 - Lalahan Hayvancılık Araştırma Enstitüsü Dergisi JF - Journal JO - JOR SP - EP - SN - 1016-877X- M3 - doi: 10.46897/lahaed.779729 UR - https://doi.org/10.46897/lahaed.779729 Y2 - 2020 ER - EndNote %0 Lalahan Hayvancılık Araştırma Enstitüsü Dergisi Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep %A Mahmut Keski̇n , Sabri Gül , Osman Bi̇çer , Zühal Gündüz , Sedat Behrem %T Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep %D 2020 %J Lalahan Hayvancılık Araştırma Enstitüsü Dergisi %P 1016-877X- %R doi: 10.46897/lahaed.779729 %U 10.46897/lahaed.779729 ISNAD Keski̇n, Mahmut , Gül, Sabri , Bi̇çer, Osman , Gündüz, Zühal , Behrem, Sedat . "Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep". Lalahan Hayvancılık Araştırma Enstitüsü Dergisi (Ağustos 2020): - . https://doi.org/10.46897/lahaed.779729 AMA Keski̇n M , Gül S , Bi̇çer O , Gündüz Z , Behrem S . Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep. Lalahan Hayvancılık Araştırma Enstitüsü Dergisi. 2020; -. Vancouver Keski̇n M , Gül S , Bi̇çer O , Gündüz Z , Behrem S . Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep. Lalahan Hayvancılık Araştırma Enstitüsü Dergisi. 2020; -. Tam Metin ( )
, Xiangbing Wang, Daniel D. Bikle
Published: 11 February 2020
Frontiers in Endocrinology, Volume 11; https://doi.org/10.3389/fendo.2020.00040

Abstract:
Editorial on the Research TopicVitamin D Binding Protein, Total and Free Vitamin D Levels in Different Physiological and Pathophysiological Conditions Vitamin D binding protein (DBP) is a major plasma carrier for vitamin D and its metabolites. In recent years, there has been growing interest in understanding the physiological functions and attributes of DBP. The current issue is comprised of five review articles and two original research papers concerning the physiology of DBP and its role in different disorders. Poor vitamin D status is highly prevalent in many different countries (1–4), but the exact definition of vitamin D status is controversial. The plasma concentration of total 25-hydroxyvitamin D [25(OH)D] is currently used as an indicator of vitamin D status. In the past decades, however, there has been argument as to whether just measuring total 25(OH)D is appropriate for the assessment of vitamin D status in different physiological and pathophysiological conditions (5, 6). About 85% of the total circulating 25(OH)D is bound to DBP, and 15% is bound to albumin. About 0.03% of 25(OH)D circulates in free form. Since 25(OH)D is weakly bound to albumin and dissociates from it during tissue perfusion, the sum of the free and the albumin-bound 25(OH)D represents the bioavailable 25(OH)D, which may be readily available for metabolic function. In contrast, the DBP-bound vitamin D is relatively unavailable to target tissue, with the exception of a few tissues such as the kidney that express a megalin/cubilin transport system for DBP-bound 25(OH)D. The concept that it is the free hormone and not the DBP-bound hormone that enters cells is known as the free hormone hypothesis. In the review by Bikle and Schwartz it is highlighted that the DBP level is regulated by estrogen, glucocorticoids, and inflammatory cytokines but not by vitamin D itself, and therefore, these regulators would affect levels of total 25(OH)D. The review by Bikle and Schwartz focuses on the biological importance of DBP with emphasis on its regulation of total and free vitamin D metabolite levels in various clinical conditions. They also point out that attempts to calculate the free level using affinity constants generated in a normal individual along with measurement of DBP and total 25(OH)D have not accurately reflected directly measured free levels in a number of clinical conditions. The authors examine the impact of different clinical conditions as well as different DBP alleles on the relationship between total and free 25(OH)D, using only data in which the free 25(OH)D level was directly measured. Following their previous review (7), the review by Chun et al. discussed a number of important questions including the following. Is the total 25(OH)D (bound plus free) or the unbound free 25(OH)D the crucial determinant of the non-classical actions of vitamin D? While DBP-bound 25(OH)D is important for renal handling of 25(OH)D and endocrine synthesis of 1,25(OH)2D, how does DBP impact extra-renal synthesis of 1,25(OH)2D and subsequent 1,25(OH)2D actions? Are there pathophysiological contexts where total 25(OH)D and free 25(OH)D would diverge in value as a marker of vitamin D status? This review aims to introduce the concept of free 25(OH)D and the molecular biology and biochemistry of vitamin D and DBP, which provides the context for free 25(OH)D, and surveys in vitro, animal, and human studies taking free 25(OH)D into consideration. Low DBP levels in patients with primary hyperparathyroidism (PHPT) were first reported in 2013 by Wang's group (8) and confirmed by Battista et al. (9). In the paper by Wang et al., the authors recruited 75 patients with PHPT and 75 healthy control subjects. In addition, 25 PHPT patients underwent parathyroidectomy and had a 3-month follow up visit. The results showed that serum DBP levels were lower in patients with PHPT but that parathyroidectomy restored DBP levels. Lower DBP levels may be one of the contributing factors of low total 25(OH)D level in PHPT patients, and the total 25(OH)D levels might not reflect true vitamin D status in patients with PHPT. In the comprehensive review by Bouillon et al. it was noted that DBP was originally discovered as a highly polymorphic protein useful for population studies and originally called Group-specific Component (GC). It is now known that DBP and GC are the same protein and appeared early in the evolution of vertebrates. DBP is genetically the oldest member of the albuminoid family (which includes albumin, α-fetoprotein, and afamin, all involved in the transport of fatty acids or hormones). DBP has a single binding site for all vitamin D metabolites with a high affinity for 25(OH)D, thereby creating a large pool of circulating 25(OH)D, which prevents rapid vitamin D deficiency. The review also highlighted the roles of DBP in preventing the urinary loss of 25(OH)D and the formation of polymeric actin fibrils in the circulation after tissue damage. DBP also plays a minor role in transporting fatty acids. Based on the fact that the total concentrations of 25(OH)D and 1,25(OH)2D in DBP null mice or humans are extremely low but calcium and bone homeostasis remain normal, the “free hormone hypothesis” appears to apply to the vitamin D hormones, 25(OH)D or 1,25(OH)2D, as it does to other steroid hormones and thyroid hormone. Vitamin D is important for bone health but may also have extra-skeletal effects. Cunningham et al. examined vitamin D metabolites in serum samples from age- and weight-matched women with and without PCOS and reported results in their paper. The authors found that 25-hydroxy-3epi-Vitamin D3, 25-hydroxyvitamin D2, 25-hydroxyvitamin D3, and 24,25-dihydroxyvitamin D3, but not 1,25-dihydroxyvitamin D3 [1,25(OH)2D3], were associated with embryo parameters. The data suggest that vitamin D metabolites other than 1,25(OH)2D3 are important in fertility. Kew, in his review assesses the fundamental role of DBP in neutrophilic inflammation and injury. As highlighted by Kew, DBP induces selective recruitment of neutrophils. DBP is also an extracellular scavenger for actin released from damaged/dead cells, and formation of DBP-actin complexes is an immediate host response to tissue injury. DBP bound to G-actin functions as an indirect but essential cofactor for neutrophil migration. Vitamin D and DBP have immunological effects and may be important in the development of type 1 diabetes (T1DM). Moreover, low total 25(OH)D levels are associated with the development of type 2 diabetes (T2DM). However, there are no convincing data showing that vitamin D supplementation has an effect on the prevention of T2DM (10). The review by Jorde discusses the relations between DBP and total and free 25(OH)D in T1DM and T2DM. All authors listed have made a substantial, direct and intellectual contribution to the work, and approved it for publication. This study was supported by National Natural Science Foundation of China (81672646, 81471055). The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. 1. Xie Z, Xia W, Zhang Z, Wu W, Lu C, Tao S, et al. Prevalence of vitamin D inadequacy among chinese postmenopausal women: a nationwide, multicenter, cross-sectional study. Front Endocrinol. (2007) 9:782. doi: 10.3389/fendo.2018.00782 PubMed Abstract | CrossRef Full Text | Google Scholar 2. Hypponen E, Power C. Hypovitaminosis D in British adults at age 45 y: nationwide cohort study of dietary and lifestyle predictors. Am J Clin Nutr. (2007) 85:860–8. doi: 10.1093/ajcn/85.3.860 PubMed Abstract | CrossRef Full Text | Google Scholar 3. Byun EJ, Heo J, Cho S, Lee HJD, Kim HS. Suboptimal vitamin D status in Korean adolescents: a nationwide study on its prevalence, risk factors including cotinine-verified smoking status and association with atopic dermatitis and asthma. BMJ Open. (2017) 7:e016409. doi: 10.1136/bmjopen-2017-016409 PubMed Abstract | CrossRef Full Text | Google Scholar 4. Acherjya GK, Ali M, Tarafder K, Akhter N, Chowdhury MK, Islam DU, et al. Study of vitamin D deficiency among the apparently healthy population in Jashore, Bangladesh. Mymensingh Med J. (2019) 28:214–21. PubMed Abstract | Google Scholar 5. Youselzadeh P, Shapese SA, Wang X. Vitamin D binding protein impact on 25-hydroxyvitamin D levels under different physiologic and pathologic conditions. Int J Endocrinol. (2014) 2014:981581. doi: 10.1155/2014/981581 CrossRef Full Text | Google Scholar 6. Jassil N, Sharma A, Bikle DD, Wang X. Vitamin D binding protein and 25-hydroxyvitamin D levels: emerging clinical applications. Endocr Pract. (2017) 23:605–61. doi: 10.4158/EP161604.RA PubMed Abstract | CrossRef Full Text | Google Scholar 7. Chun RF, Peercy BE, Orwoll ES, Nielson CM, Adams JS, Hewison M. Vitamin D and DBP: the free hormone hypothesis revisited. J Steroid Biochem Mol Biol. (2014) 144 Pt A:132–7. doi: 10.1016/j.jsbmb.2013.09.012 PubMed Abstract | CrossRef Full Text | Google Scholar 8. Wang X, Shapses SA, Wei S, Sukumar D, Ghosh J. Vitamin D-binding protein levels in female patients with primary hyperparathyroidism. Endocr Pract. (2013) 19:609–13. doi: 10.4158/EP12371.OR PubMed Abstract | CrossRef Full Text | Google Scholar 9. Battista C, Guarnieri V, Carnevale V, Baorda F, Pileri M, Garrubba M, et al. Vitamin D status in primary hyperparathyroidism: effect of genetic background. Endocrine. (2017) 55:266–72. doi: 10.1007/s12020-016-0974-x PubMed Abstract | CrossRef Full Text | Google Scholar 10. Pittas AG, Dawson-Hughes B, Sheehan P, Ware JH, Knowler WC, Aroda VR, et al. Vitamin D Supplementation and Prevention of Type 2 Diabetes. N Engl J Med. (2019) 381:520–30. doi: 10.1056/NEJMoa1900906 CrossRef Full Text | Google Scholar Keywords: vitamin D binding protein, total 25-hydroxyvitamin D, free 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D, bioavailable 25-hydroxyvitamin D Citation: Xie Z, Wang X and Bikle DD (2020) Editorial: Vitamin D Binding Protein, Total and Free Vitamin D Levels in Different Physiological and Pathophysiological Conditions. Front. Endocrinol. 11:40. doi: 10.3389/fendo.2020.00040 Received: 13 January 2020; Accepted: 22 January 2020; Published: 11 February 2020. Edited and reviewed by: Jonathan H. Tobias, University of Bristol, United Kingdom Copyright © 2020 Xie, Wang and Bikle. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. *Correspondence: Zhongjian Xie, [email protected]
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