1 Department of Prenatal Cardiology, Polish Mother Memorial Hospital Research Institute, Łódź, Poland.
2 Department for Prenatal and Gynecological Sonography, Division of Prenatal Medicine, University of Giessen and Marburg, Germany.
3 Department of Perinatal Medicine University of Montevideo, Uruguay.
4 Department of Obstetrics, Federal University of São Paulo, Brazil.
5 Department of Obstetrics and Gynecology, Kaplan Medical Center, Rehovot, Israel.
6 Department of Obstetrics and Gynecology, Izmir Katip Çelebi University, Izmir, Turkey.
7 Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD and Detroit, MI; Detroit Medical Center, Hutzel Women's Hospital, Detroit, MI; Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA.
8 Division of Pediatric Cardiology, Fetal Cardiology Program, Children's Hospital Los Angeles, USA.
9 Department of Obstetrics and Gynecology, University of Rome Tor Vergata, Roma, Italy.
10 Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, University of Rochester School of Medicine and Dentistry, Rochester, USA.
11 Department of Pediatric Cardiology, UCLA Medical Center, Santa Monica Mattel Children's Hospital UCLA, Santa Monica, USA.
12 Fetal Medicine Department Obstetrics, Gynecology University Hospitals Leuven, Belgium.
13 Division of Reproductive Imaging and Genetics, Jefferson University Hospitals, Philadelphia, USA.
14 Department of Obstetrics and Gynecology, Weill Cornell Medical Center, New York, USA.
15 Centro Hospitalar Lisboa Central, Maternidade Dr Alfredo da Costa, Lisboa, Portugal.
16 Fetal Cardiology Unit, Ukrainian Children's Cardiac Center, Kyiv, Ukraine.
17 Obstetrics and Gynecology Department, Polish Mother Memorial Hospital Research Institute, Łódź, Poland.