1. Department of Population Health Sciences, Duke University School of Medicine, Durham, NC, USA.
2. Duke Cancer Institute, Duke University School of Medicine, Durham, NC, USA.
3. Duke Center for Childhood Obesity Research, Duke University School of Medicine, Durham, NC, USA.
4. Duke Clinical Research Institute, Durham, NC, USA.
5. Department of Orthopedic Surgery, Duke University School of Medicine, Durham, NC, USA.
6. Duke Global Health Institute, Durham, NC, USA.