1. Department of Gynecology, Obstetrics and Reproduction Medicine Saarland University Homburg Germany
2. Clinic for Gynecology and Obstetrics University Clinical Center of Serbia Belgrade Serbia
3. Faculty of Medicine University of Belgrade Belgrade Serbia
4. Department of Obstetrics and Gynaecology Pia Fondazione Cardinale G. Panico Tricase Italy
5. Department of Anesthesia and Intensive Care, and CERICSAL (CEntro di RIcerca Clinico SALentino) “Veris delli Ponti Hospital” Scorrano Lecce Italy
6. Department of Obstetrics and Gynecology, and CERICSAL (CEntro di RIcerca Clinico SALentino) “Veris delli Ponti Hospital” Scorrano Lecce Italy