1. HarvestPlus, International Food Policy Research Institute, Washington DC
2. International Potato Center, Kampala, Uganda
3. Consultant to HarvestPlus, International Food Policy Research Institute, Kampala, Uganda
4. Department of Pediatrics and Child Health, School of Medicine, Makerere University, Kampala, Uganda
5. Biochemistry Department, College of Natural Sciences, Makerere University, Kampala, Uganda
6. Department of Statistics, Iowa State University, Ames, IA
7. International Food Policy Research Institute, Washington, DC