1. Department of Public Health Sciences, University of California, Davis, California, USA
2. Department of Community Health Sciences, Aga Khan University, Karachi, Pakistan
3. College of Public Health, University of Kentucky, Lexington, Kentucky, USA
4. Department of Nutrition and Program in International and Community Nutrition, University of California, Davis, California, USA
5. Department of Pediatrics and Child Health, Aga Khan University, Karachi, Pakistan