1. Department of Gynecology and Gynecologic Oncology, Medical University of Białystok, Białystok, Poland
2. Department of Gynecology and Obstetrics, Faculty of Medical Sciences, University of Warmia and Mazury, Olsztyn, Poland
3. Department of Statistics and Medical Informatics, Medical University of Białystok, Białystok, Poland
4. Division of Perinatal Medicine, University of Colorado Denver, Aurora, CO, USA
5. Department of Reproductive Health, National Research Institute of Mother and Child, Warsaw, Poland
6. Medical Institute, State Higher School of Computer Science and Business Administration, Łomża, Poland