1. University of Pittsburgh Medical Center, PA (D.K.P., A.B., S.J., N.C.W., S.S., A.B.).
2. Harvard T.H. Chan School of Public Health, Boston, MA (D.K.P.).
3. Baystate Medical Center, Springfield, MA (A.B., S.K.S.M.).
4. Department of Internal Medicine, West Virginia University, Morgantown (M.B.M.).
5. Department of Internal Medicine, University of California San Diego, La Jolla (M.B.M.).