1. Department of Public Health Sciences, College of Medicine, University of Virginia, Charlottesville, VA, USA
2. Department of Nutrition and Food Sciences, University of Vermont, Burlington, VT, USA
3. Biomedical Statistics, Larner College of Medicine, University of Vermont, Burlington, VT, USA
4. Duke-NUS Medical School and Duke University Global Health Institute, singapore
5. Arnold School of Public Health, University of South Carolina, Columbia, SC, USA