1. Department of Integrative Physiology (C.B., D.S.D., P.P.J., D.D.C., D.S.P., D.R.S.), University of Colorado at Boulder, Boulder, Colorado 80309
2. Department of Food Science and Human Nutrition (K.O., C.L.M.), Colorado State University, Fort Collins, Colorado 80523
3. Department of Medicine (Geriatric Medicine) (D.R.S.), University of Colorado Health Sciences Center, Denver, Colorado 80262