1. Department of Physiology, Faculty of Medicine, Medical University of Gdansk, ul. Debinki 1, 80-210 Gdansk, Poland
2. 1st Department of Obstetrics and Gynecology, Centre for Postgraduate Medical Education, ul. Żelazna 90, 02-004 Warsaw, Poland
3. Department of Biochemistry, Faculty of Medicine, Medical University of Gdansk, ul. Debinki 1, 80-210 Gdansk, Poland
4. Department of Endocrinology and Internal Medicine, Medical University of Gdansk, 80-210 Gdansk, Poland