1. Department of Food, Bioprocessing, and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina.
2. Department of Statistics, North Carolina State University, Raleigh, North Carolina.
3. Department of Nutrition, University of North Carolina at Greensboro, Greensboro, North Carolina.
4. Lactation Service & Provincial Milk Bank, BC Women's Hospital, Vancouver, British Columbia, Canada.