1. Division of Fetal and Transitional Medicine; Children's National Health System; George Washington University; Washington DC USA
2. Division of Cardiology; Children's Hospital Los Angeles; Keck School of Medicine; University of Southern California; Los Angeles CA USA
3. Department of Prenatal Cardiology; Polish Mother's Memorial Hospital Research Institute; Lodz Poland
4. Faculty of Health Sciences; The State University of Applied Sciences; Plock Poland
5. Special Delivery Service; Pediatric Cardiology; University of New Mexico; Albuquerque NM USA
6. Division of Cardiology; Department of Pediatrics; UCSF Benioff Children's Hospital; San Francisco CA USA
7. Fetal Heart Program; Division of Cardiology; Children's National Health System; Washington DC USA