[1] Univ Padua, Dept Cardiac Thorac Vasc Sci & Publ Hlth, Thorac Surg Unit, I-35121 Padua, Italy
[2] Univ Padua, Dept Cardiac Thorac Vasc Sci & Publ Hlth, Unit Biostat Epidemiol & Publ Hlth, I-35121 Padua, Italy
[3] Univ Siena, Lung Transplant Unit, Azienda Osped Univ Senese, I-53100 Siena, Italy
[4] Univ Siena, Resp Dis & Lung Transplant Unit, Azienda Osped Univ Senese, I-53100 Siena, Italy
[5] Univ & Hosp Trust Borgo Trento, Dept Thorac Surg, I-37126 Verona, Italy