1. Institute for Sex Research, Sexual Medicine, and Forensic Psychiatry, University Medical-Centre Hamburg-Eppendorf, Germany
2. Institute of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Germany
3. Department of Sociology, Faculty of Humanities and Social Sciences, University of Zagreb, Croatia
4. Institute of Forensic Psychiatry and Sex Research, Center for Translational Neuro- and Behavioral Sciences, University of Duisburg-Essen, Essen, Germany
5. Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA
6. Department of Mental Health and Substance Abuse, World Health Organization, Geneva, Switzerland