1. Department of Obstetrics and Gynecology, University Hospital of Schleswig Holstein, Luebeck, Germany
2. Department of Obstetrics and Gynecology, University Hospital of Schleswig Holstein, Kiel, Germany
3. Endometriosis Research Center, Iran University of Medical Sciences (IUMS), Tehran, Iran
4. Second Department of Obstetrics and Gynecology, Medical School, Aristotle University of Thessaloniki, Thessaloniki, Greece
5. Department of Obstetrics and Gynecology, Filippo Del Ponte Hospital, University of Insubria, Varese, Italy
6. Department of Obstetrics and Gynecology, George Washington University School of Medicine and Health Sciences, Washington, DC, USA