1. Institute for Sex Research and Forensic Psychiatry, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany;
2. Department of Psychiatry and Psychotherapy, University Medical Centre Mainz, Johannes Gutenberg University Mainz, Mainz, Germany;
3. School of Law & Politics, University of Hull, Hull, UK;
4. College of Physicians and Surgeons, Department of Psychiatry, Columbia University, New York, NY, USA