1. Grand Forks Human Nutrition Research Center, USDA Agricultural Research Service, Grand Forks, ND, USA
2. The Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA, USA
3. Department of Physiology, University of Peradeniya, Peradeniya, Sri Lanka
4. Nutritional Science Department and Obesity Research Institute, Texas Tech University, Lubbock, TX, USA