1. Division of General Medical Disciplines; Stanford University; Palo Alto California USA
2. Center for Obesity Research and Education; Department of Public Health; Temple University; Philadelphia Pennsylvania USA
3. Dalla Lana School of Public Health, University of Toronto; Toronto Canada
4. Gillings School of Global Public Health, University of North Carolina; Chapel Hill North Carolina USA
5. Prevention Research Center, Stanford University; Stanford California USA
6. Department of Public Health and Policy; London School of Hygiene and Tropical Medicine; London UK