From the Division of Pharmacoepidemiology and Pharmacoeconomics (Dr Brookhart, Dr Solomon, Dr Glynn); Division of Rheumatology, Immunology, and Allergy (Dr Solomon); and Center for Cardiovascular Disease Prevention, Brigham and Women's Hospital & Harvard Medical School, Boston, Massachusetts (Dr Ridker); and the Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina (Dr Brookhart). Submitted for publication June 21, 2010; revised version accepted September 13, 2010. Address for correspondence: M. Alan Brookhart, Department of Epidemiology, UNC Gillings School of Global Public Health, University of North Carolina at Chapel Hill, McGavran-Greenberg, CB # 7435 Chapel Hill, NC 27599-7435; e-mail: [email protected].
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