1. Perelman School of Medicine and Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania (G.K.D., C.E.L., J.D.L.)
2. College of Pharmacy, University of Florida, Gainesville, Florida (E.D.)
3. Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania (A.C.)
4. and University of Michigan, Ann Arbor, Michigan (G.D.B.).