1. Department of Prenatal Cardiology Polish Mother's Memorial Hospital Research Institute Lodz Poland
2. Department of Obstetrics and Perinatology, Chair of Obstetrics, Gynecology and Oncological Gynecology Medical University of Lodz Lodz Poland
3. Department of Diagnosis and Prevention of Fetal Malformations Medical University of Lodz Lodz Poland
4. Faculty of Health Sciences The Mazovian State University Plock Poland