1 Pelvic Pain Medicine and Neuromodulation UCLH, London, United Kingdom.
2 Department of Urology and Sexology, Medical Centre Leeuwarden, Leeuwarden, Netherlands.
3 Departments of Anesthesiology/Division of Pain Medicine, Neurology and Psychology, University of Alabama at Birmingham, Birmingham, AL, United States.
4 Department Internal Medicine 1 (Gastroenterology, Hepatology, Oncology, Infectious Diseases), Klinikum Saarbrücken, Saarbrücken, Germany.
5 Department Psychosomatic Medicine and Psychotherapy, Technische Universität München, Germany.