1. IFT Institut Fuer Therapieforschung Munich Germany
2. Helmholtz Zentrum Muenchen Institute of Health Economics and Health Care Management Munich Germany
3. Department of Palliative Medicine Ludwig Maximilians University Hospital Munich Germany
4. German University of Health and Sport Ismaning Germany
5. Department for Public Health Sciences Centre for Social Research on Alcohol and Drugs Stockholm University Stockholm Sweden
6. Institute of Psychology ELTE Eötvös Loránd University Budapest Hungary