1. Surgical and Interventional Sciences, Royal Free Hospital Campus, University College London Medical School, United Kingdom (M.R.D.).
2. Department of Cardiovascular Surgery, Hospital do Coração Anis Rassi, Goiânia, Goiás, Brazil (B.B.P.).
3. Department of Cardiothoracic and Vascular Surgery, Faculty of Medicine and Health, Örebro University, Sweden (D.S.R.S.).