1. Section of Health Care Research and Rehabilitation Research, Institute of Medical Biometry and Statistics, Faculty of Medicine and Medical Center University of Freiburg Freiburg Germany
2. Department of Internal Medicine I University Medical Center of the Johannes Gutenberg‐University Mainz Germany
3. Institute of Medical Biometry and Statistics, Faculty of Medicine and Medical Center University of Freiburg Freiburg Germany
4. Institute for Occupational Medicine and Public Health Saarland University Homburg Germany
5. Hannover Medical School Hannover Germany
6. Department of Law and Economics Johannes Gutenberg University Mainz Germany