1. Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
2. Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
3. Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
4. Department of Pediatrics, Division of Gastroenterology, Hepatology and Nutrition, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
5. University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
6. Department of Pediatrics, Division of Endocrinology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
7. Social & Scientific Systems, Inc., Durham, North Carolina
8. Department of Radiology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
9. Division of Laboratory Sciences, Centers for Disease Control and Prevention, Atlanta, Georgia
10. Endocrine Sciences, LabCorp, Calabasas Hills, California
11. Quest Diagnostics Nichols Institute, San Juan Capistrano, California