1. European Medical and Research Center (CEMER), University of Perugia, Perugia, Italy
2. Department of Obstetrics and Gynecology, I.M. Sechenov First State University of Moscow, Moscow, Russia
3. Department of Obstetrics and Gynaecology and Centre for Perinatal and Reproductive Medicine, University of Perugia, Perugia, Italy
4. Almazov State Perinatal Centre, St. Petersburg, Russia