1. Department of Dermatology and Venereology, Medical University of Graz, Graz, Austria
2. Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria
3. Department of Medical Psychology and Psychotherapy, Medical University of Graz, Graz, Austria
4. Center for Integrative Addiction Research, Grüner Kreis Society, Vienna, Austria
5. Department of Psychiatry, Medical University of Graz, Graz, Austria