Bias in the case - crossover design: implications for studies of air pollution
- 27 November 2000
- journal article
- research article
- Published by Wiley in Environmetrics
- Vol. 11 (6), 689-704
- https://doi.org/10.1002/1099-095x(200011/12)11:6<689::aid-env439>3.0.co;2-n