1. Department of Orthopaedic Surgery, Duke University Medical School, Durham, NC, USA.
2. Department of Population Health Sciences, Duke University Medical School, Durham, NC, USA.
3. New York City Department of Health and Mental Hygiene, Office of School Health, New York, NY, USA.
4. Duke Clinical Research Institute, Duke University, Durham, NC, USA.
5. Department of Pediatrics, Duke University Medical School, Durham, NC, USA.
6. Duke Global Health Institute, Durham, NC, USA.