1. Department of Medicine (S.L.W., K.M.), Columbia University College of Physicians & Surgeons, New York, New York 10032
2. Department of Internal Medicine (C.F.B.), University of Michigan Medical School, Ann Arbor, Michigan 48019
3. Center for Human Nutrition and Atkins Center for Excellence in Obesity Medicine (S.K.), Washington University School of Medicine, St Louis, Missouri 63110
4. Faculties of Life Sciences and Medical and Human Sciences (A.W.), University of Manchester, Manchester M13 9PL, United Kingdom
5. Department of Neurology (T.K., B.P.L., R.J.B), Washington University School of Medicine, St Louis, Missouri 63110