1. Departments of Endocrinology and Metabolic Diseases (M.K., J.A.R., O.M.D.), Leiden University Medical Center, 2300 RC Leiden, The Netherlands
2. Division of Pharmacoepidemiology and Pharmacotherapy (P.C.S., A.d.B.), Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3508 TB Utrecht, The Netherlands
3. PHARMO Institute for Drug Outcome Research (R.M.C.H.), 3508 AE Utrecht, The Netherlands
4. Department of Health Policy and Management (R.M.C.H.), Erasmus Medical Center, 3000 DR Rotterdam, The Netherlands
5. Clinical Epidemiology (J.P.V., O.M.D.), Leiden University Medical Center, 2300 RC Leiden, The Netherlands