1. Department of Population Medicine; Harvard Medical School and Harvard Pilgrim Health Care Institute; Boston MA USA
2. Division of Pharmacoepidemiology and Pharmacoeconomics; Brigham and Women's Hospital and Harvard Medical School; Boston MA USA
3. Department of Mathematics and Statistics; Boston University; Boston MA USA
4. Division of Geriatric Medicine; University of Massachusetts Medical School; Worcester MA USA
5. Meyers Primary Care Institute; Worcester MA USA
6. Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Services; University of Washington; Seattle WA USA
7. Group Health Research Institute; Seattle WA USA
8. RTI Health Solutions; RTI International; Research Triangle Park NC USA
9. Department of Epidemiology; Boston University School of Public Health; Boston MA USA
10. Division of Clinical Immunology and Rheumatology; The University of Alabama at Birmingham; Birmingham AL USA
11. Departments of Epidemiology and Medical Informatics; Erasmus University Medical Center; Rotterdam The Netherlands
12. Department of Clinical Epidemiology; Leiden University Medical School; Leiden The Netherlands
13. Department of Pharmaceutical Outcomes and Policy, College of Pharmacy; University of Florida; Gainesville FL USA
14. Department of Epidemiology, College of Public Health and Health Professions and College of Medicine; University of Florida; Gainesville FL USA
15. Center for Clinical Epidemiology and Biostatistics and Department of Biostatistics and Epidemiology, Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA