1. Department of Gynecology and Obstetrics; University Medicine Tübingen; Tübingen Germany
2. Department of Urology; University Medicine Greifswald; Greifswald Germany
3. Department of Dermatology; University Medicine Greifswald; Greifswald Germany
4. Department of Hygiene and Environmental Medicine; University Medicine Greifswald; Greifswald Germany