Georgia Prevention Center, Institute of Prevention and Public Health, Georgia Regents University, Augusta, Georgia; College of Nursing, Medical University of South Carolina, Charleston, South Carolina; Department for Human Genetics, University Hospital Gasthuisberg, KU Leuven, Leuven, Belgium; Hypertension and Cardiovascular Rehabilitation Unit, Department of Cardiovascular Diseases, KU Leuven, Leuven, Belgium; Research School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre, Maastricht, The Netherlands; Cluster of Genetics and Cell Biology, Department of Complex Genetics, Maastricht University Medical Centre, Maastricht, The Netherlands; Medical Research Council Epidemiology Unit, Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, United Kingdom; Department of Biomedical Kinesiology, Faculty of Kinesiology and Rehabilitation Sciences, University Hospital Gasthuisberg, KU Leuven, Leuven, Belgium; Genetics of Obesity and Related Metabolic Traits Program, Institute for Personalized Medicine, Child Health and Development Institute, Department of Preventive Medicine, Mount Sinai School of Medicine, New York; Unit of Genetic Epidemiology and Bioinformatics, Department of Epidemiology, University of Groningen, University Medical Center Groningen, The Netherlands. Georgia Prevention Center, Institute of Prevention and Public Health, Georgia Regents University, Augusta, Georgia; xwang@gru.edu.