Pieter A Cohen1, Jerry Avorn1, Aaron S Kesselheim1. 1. From Cambridge Health Alliance, Somerville (P.A.C.), and Harvard Medical School (P.A.C., J.A., A.S.K.) and the Program on Regulation, Therapeutics, and Law, Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital (J.A., A.S.K.), Boston - all in Massachusetts.