Proceedings of 'the challenges and promises of a follow-up study of a randomly selected cohort of 100,000 pre and post conception women and their offspring through 21 years of life: design, implementation and analysis issues of the National Children's Study '.
Department of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. jellenbe@mail.med.upenn.edu
Jonas H
JH
Ellenberg
D002648:Child; D002669:Child Welfare; D015331:Cohort Studies; D004782:Environmental Health; D005260:Female; D006801:Humans; D009035:Mothers; D014481:United States