1. From the Department of Epidemiology, Graduate School of Public Health (IM-G, CHB, LHK, RWE, and JMZ), and the Division of Endocrinology and Metabolism, Department of Medicine (BHG), University of Pittsburgh, Pittsburgh, PA; the Department of Radiology, McMaster University, Hamilton, ON, Canada (CLG); and the Tobago Health Studies Office, Scarborough, Tobago, Trinidad & Tobago (ALP and VWW)