1. Spitalul Clinic de Urgenta Floreasca, General Surgery, Bucharest, Romania
2. Obstetrics and Gynecology, Il Sagbal Sheynovo Hospital, Sofia, Bulgaria
3. Department of Obstetrics and Gynecology, Medical University of Innsbruck, Innsbruck, Austria
4. Obstetrics and Gynaecology, Institute of Mother and Child Health Alessandrescu Russescu, Bucharest, Romania
5. Department of Obstetrics and Gynaecology, Institute of Child and Maternal Care “Alfred Rusescu”, Bucharest, Romania