Ultrasound in Obstetrics: Do the Published Evaluative Studies Justify its Routine Use?

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Abstract
Ringa V (Unité de Recherches Epidémiologiques sur la Mère et L'Enfant, INSERM U149, 123, boulevard de Port-Royal, 75014 Paris, France), Blondel B and Breart G. Ultrasound in obstetrics: do the published evaluative studies justify its routine use? International Journal of Epidemiology 1989, 18: 489–497.