1. Maternal Nutrition Group, Department of Epidemiology Research, Statens Serum Institut, Arillerivej 5, building 305, 2300 Copenhagen, Denmark, Department of Epidemiology, School of Public Health, University of California at Los Angeles, Box 951772, Los Angeles, California 90095, Institute of Public Health, University of Aarhus, Høegh-Guldbergsgade 6A, 8000 Aarhus C, Denmark, International Epidemiology Institute, 1455 Research Boulevard, Suite 550, Rockville, Maryland 20850, Vanderbilt University Medical...