1. From the First Affiliated Hospital (L.W., X.L., X.T.), Medical College of Shantou University, Shantou, China; the Laboratory of Human Genetics (Y.S., X.L., X.W.), Beijing Hypertension League Institute, Beijing, China; the National Research Institute for Family Planning (X.M.), Beijing, China; the Department of Epidemiology (B.X., J.M.), Capital Institute of Pediatrics, Beijing, China; and the Roche Center for Medical Genomics (K.L.), F. Hoffmann-La Roche Ltd, Basel, Switzerland.