[1] Evangelismos Med Ctr, Dept Cardiac Surg 2, Transplantat Unit, Athens, Greece
[2] Univ Ioannina, Sch Med, GR-45110 Ioannina, Greece
[3] Aristotle Univ Thessaloniki, G Papanikolaou Gen Hosp, Dept Pulm, Oncol Unit, GR-54006 Thessaloniki, Greece
[4] Univ Gen Hosp Alexandroupolis, Dept Surg, NHS, Alexandroupolis, Greece
[5] Theageneio Anticanc Hosp, Dept Internal Med, Thessaloniki, Greece
[6] St Luke Private Hosp, Dept Cardiothorac Surg, Thessaloniki, Greece