1. Institute for Epidemiology Social Medicine and Health Systems Research Hannover Medical School Hannover Germany
2. Center for Health Economics Research Hannover (CHERH) Hannover Germany
3. Institute of Health Economics and Health Care Management Hochschule Neubrandenburg Neubrandenburg Germany
4. Duke Department of Population Health Sciences and Duke Global Health Institute Duke University Durham NC USA
5. Department of General, Visceral and Transplant Surgery Medical University Graz Graz Austria
6. Transplant Center Graz Medical University Graz Graz Austria