1. Department of Obstetrics and Perinatology, University Hospital, 30-551 Krakow, Poland
2. Hi-Gen Centrum Medyczne, 30-552 Krakow, Poland
3. Department of Obstetrics and Pathology of Pregnancy, Medical University of Lublin, 20-081 Lublin, Poland
4. Department of Gynecology, Obstetrics and Gynecologic Oncology, Medical University of Silesia, 40-055 Katowice, Poland
5. Obstetrics and Gynecology Ward, Independent Public Healthcare Institution in Bochnia, The Blessed Marta Wiecka District Hospital, 32-700 Bochnia, Poland
6. Provincial Combined Hospital in Kielce, Clinic of Obstetrics and Gynaecology, 25-736 Kielce, Poland
7. Department of Perinatology, Obstetrics and Gynecology, Polish Mother’s Memorial Hospital-Research Institute in Lodz, 93-338 Lodz, Poland
8. Department of Obstetrics and Gynecology, Medical University of Lodz, 93-338 Lodz, Poland
9. Salve Medica, 91-210 Lodz, Poland
10. Clinical Department of Gynecological Endocrinology and Gynecology, University Hospital, 30-551 Krakow, Poland
11. Department of Obstetrics, Perinatology and Gynecology, Medical University of Warsaw, 02-091 Warsaw, Poland