1. Department of Psychiatry and Psychotherapy, Center for Mental Health, Immanuel Hospital Rüdersdorf, Brandenburg Medical School Theodor Fontane, Rüdersdorf, Germany
2. Faculty of Health Sciences Brandenburg, Brandenburg Medical School Theodor Fontane, Neuruppin, Germany
3. Faculty of Health Sciences Brandenburg, Center for Health Services Research, Brandenburg Medical School Theodor Fontane, Rüdersdorf, Germany
4. Department for Addictive Disorders, Salus Hospital Lindow, Lindow, Germany
5. HEALTH – Institute for Biomedical Research and Technologies, Joanneum Research Forschungsgesellschaft mbH, Graz, Austria
6. Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
7. Division of General Medicine Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, USA