1. Department of Clinical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
2. Department of Clinical Psychology
3. Lancashire Postgraduate School of Medicine and Health, University of Central Lancashire, Preston, United Kingdom
4. Human Sexuality Unit, St. George's Hospital Medical School, Springfield Hospital, London, United Kingdom
5. Lancashire Postgraduate School of Medicine and Health, University of Central Lancashire, Preston, United Kingdom and Pfizer Central Research, Sandwich, United Kingdom