Institution: | a Onassis Cardiac Surgery Center, Athens, Greece b Children’s Heart Center, Queen Silvia’s Hospital for Children and Adolescents, Goteborg, Sweden c the Department of Cardiothoracic Surgery, University Medical Center, Leiden, the Netherlands d Clinic for Cardiovascular Surgery, University Hospital, Bern, Switzerland e Pediatric Heart Institute, Hospital Universitario “12 de Octubre,” Madrid, Spain f Ospedale Pediatrico Bambino Gesu, Rome, Italy g Cardiac Surgery, Gasthuisberg University Hospital, Leuven, Belgium h Thorax Centre, Groningen University Medical Centre, the Netherlands i Hospital de Santa Marta, Lisbon, Portugal j Department of Cardiac Surgery, Children’s University Hospital, Bratislava, Slovakia k Bakulev Center for Cardiovascular Surgery, Moscow, Russia l Department of Thoracic and Cardiovascular Surgery, University Hospital, Oslo, Norway m Department of Cardiothoracic Surgery, Hôpital de la Timone, Marseille, France n Alder Hey Cardiac Unit, Royal Liverpool Children’s Hospital, Liverpool, United Kingdom o Service de Chirurgie Cardivasculaire et Thoracique Université Catholique de Louvain, Clinique Universitaires Saint-Luc, Brussels, Belgium p Hospital for Children and Adolescents, University of Helsinki, Helsinki, Finland q University of Padova, Padova, Italy r Deutsches Kinderherzzentrum, St Augustin, Germany s The General Infirmary, Leeds, United Kingdom t Klinik für Thorax, Herz- und Gefässchirurgie, Eberhard Karls Universitat, Tubingen, Germany |