1. Public Health and Community Nutrition Unit, National Food and Nutrition Commission, Lusaka, Zambia
2. Epidemiology and Biostatistics Unit, Department of Public Health, School of Medicine, University of Zambia, Lusaka, Zambia
3. Nutrition and Population Studies Unit, Department of Public Health, School of Medicine, University of Zambia, Lusaka, Zambia
4. Department of Nutritional Sciences, University of Wisconsin-Madison, Madison, WI, USA
5. Zambia Country Program, HarvestPlus, Lusaka, Zambia
6. Biomedical Sciences Department, Tropical Diseases Research Center, Ndola, Zambia