1. Division of Clinical Pharmacology and Toxicology, University Hospital Basel, Basel, Switzerland
2. Division of Endocrinology, Diabetes, and Clinical Nutrition, University Hospital Basel, Basel, Switzerland
3. Boston Collaborative Drug Surveillance Program, Boston University School of Medicine, Lexington, Massachusetts
4. Department of Epidemiology, School of Public Health, Boston University, Massachusetts
5. Basel Pharmacoepidemiology Unit, Division of Clinical Pharmacology and Toxicology, University Hospital Basel, Basel, Switzerland