1. Department of Preventive Medicine, Childhood Obesity Research Center, University of Southern California, Los Angeles, California
2. Department of Pediatrics, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea
3. Department of Internal Medicine/Division of Endocrinology and Diabetes, Keck School of Medicine, University of Southern California, Los Angeles, California
4. Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Tufts University School of Medicine, Boston, Massachusetts