1. From the Columbia Center for Children's Environmental Health, Mailman School of Public Health, Columbia University, New York, NY (ETM, Y-HT, W-YT, DT, and FPP); the Department of Epidemiology and Preventive Medicine, Jagiellonian University College of Medicine, Krakow, Poland (WJ); the Centers for Disease Control and Prevention, Atlanta, GA (RLS); the Department of Analytical and Environmental Ch