1. Department of Obstetrics and Gynaecology/Stage III Center for Endometriosis & Pelvic Pain; Wilhelminen Hospital; Vienna; Austria
2. Department of General Surgery; Kaiser-Franz-Josef Hospital; Vienna; Austria
3. Department of Obstetrics and Gynaecology; Hospital Vito Fazzi; Lecce; Italy
4. Clinic for Gynecology and Obstetrics; Clinical Center of Serbia; Belgrade; Serbia