1. Departments of Orthopaedics
2. Pediatrics
3. Biostatistics, University of North Carolina, Chapel Hill, North Carolina
4. Department of Pediatrics, Duke University, Durham, North Carolina
5. Department of Gastroenterology and Nutrition, Children’s Hospital and Research Center at Oakland, Oakland, California
6. Departments of Biostatistics
7. Department of Pediatrics, University of Pennsylvania, Philadelphia, Pennsylvania
8. Pediatrics, University of Virginia, Charlottesville, Virginia