1. Department of Obstetrics and Pathology of Pregnancy, Medical University of Lublin, 20-081 Lublin, Poland
2. Department of Obstetrics and Perinatology, The University Hospital in Krakow, 30-551 Krakow, Poland
3. Department of Cardiology, Medical University of Lublin, 20-081 Lublin, Poland
4. Department of Inorganic Chemistry, Medical University of Lublin, 20-081 Lublin, Poland