1. Institute of Occupational, Social, and Environmental Medicine, Centre for Health and Society, Faculty of Medicine, University of Düsseldorf, Düsseldorf, Germany
2. MEDIAN Klinik Heiligendamm, Bad Doberan, Germany
3. Nordseeklinik Borkum der DRV Rheinland, Borkum, Germany
4. Klinik Bad Reichenhall der DRV Bayern Süd, Bad Reichenhall, Germany
5. refonet – Rehabilitations-Forschungsnetzwerk der DRV Rheinland, Bad Neuenahr, Germany
6. Department of Environmental Health Sciences, Fielding School of Public Health; School of Nursing, University of California, Los Angeles, USA
7. Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Old Medical School, Teviot Place, Edinburgh, UK