[1] Great Ormond St Hosp Children NHS Fdn Trust, Dept Cardiothorac Surg, London, England
[2] Univ Hosp Ghent, Dept Cardiac Surg, Ghent, Belgium
[3] Slovak Med Univ, Bratislava, Slovakia
[4] Great Ormond St Hosp Children NHS Fdn Trust, Dept Transplantat, London, England