1. Department of Health Services Research Carl von Ossietzky University Oldenburg Oldenburg Germany
2. Department of Medicine Rotes Kreuz Hospital Bremen Germany
3. Departments of Medicine and Epidemiology McGill University Montreal QC Canada
4. Centre for Clinical Epidemiology Lady Davis Institute – Jewish General Hospital Montreal QC Canada
5. Institute of Clinical Pharmacology and Toxicology Charité‐Universitätsmedizin Berlin Berlin Germany