1. Institute of Medical Biometry and Informatics (IMBI); Heidelberg University; Heidelberg Germany
2. Schumpeter School of Business and Economics; University of Wuppertal; Wuppertal Germany
3. Institute of Health and Society; Newcastle University; Newcastle upon Tyne UK
4. Department of General Practice and Health Services Research; University Hospital Heidelberg; Heidelberg Germany
5. Department of Conservative Dentistry; Heidelberg University; Heidelberg Germany
6. Max Planck Institute for Social Law and Social Policy; Munich Center for the Economics of Aging; Munich Germany