1. 1. Department of Obstetrics, Medical University of Gdansk, Poland
2. 2. Department of Diagnoses and Prevention Fetal Malformations, Medical University of Lodz, Poland
3. 3. Department of Prenatal Cardiology, Polish Mother’s Memorial Hospital Research Institute, Lodz, Poland
4. 4. Institute of Health Sciences, The State School of Higher Professional Education in Płock, Poland
5. 5. Department of Obstetrics and Gynecology, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
6. 6. Thomas Jefferson University and Hospitals, Philadelphia, Pennsylvania, United States of America
7. 7. Department of Obstetrics and Prenatal Medicine, University Bonn Medical School, Bonn, Germany
8. 8. Department of Obstetrics and Gynecology, Università Roma Tor Vergata, Ospedela Fatebenefratelli Isola Tiberina, Rome, Italy
9. 9. Department of Obstetrics and Gynecology, The Chaim Sheba Medical Center Tel-Hashomer, Sackler School of Medicine, Tel-Aviv University, Israel
10. 10. Division of Pediatric Cardiology, Children’s Hospital Los Angeles, Los Angeles, CA, United States of America ; Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
11. 11. Division of Pediatric Cardiology, Department of Pediatrics, David Geffen School of Medicine, Los Angeles, California, United States of America
12. 12. Department of Pediatric Cardiology, Then Fetal Heart Program, Colorado Fetal Care Center, Colorado Institute for Maternal Fetal Health, Children’s Hospital Colorado, University of Colorado School of Medicine, Aurora, Colorado, United States of America
13. 13. Center for Mother and Child, Philipps University, Marburg, Germany
14. 14. Department of Obstetrics and Gynecology, Kaplan Medical Center, 76100 Rehovot and the Hadassah-Hebrew University School of Medicine, Jerusalem, Israel .