1 Department of Epidemiology, Harvard T.H. Chan School of Public Health.
2 Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School.
3 Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School; Department of Biostatistics, Harvard T.H. Chan School of Public Health.