Thoracic surgery service, Hospital Universitario, Donostia, Gipuzkoa 20014, Spain;
Thoracic surgery service, Hospital Universitario, Donostia, Gipuzkoa 20014, Spain;
Thoracic surgery service, Hospital Universitario, Donostia, Gipuzkoa 20014, Spain;
Thoracic surgery service, Hospital Universitario, Donostia, Gipuzkoa 20014, Spain;
Thoracic surgery service, Hospital Universitario, Donostia, Gipuzkoa 20014, Spain;
Thoracic surgery service, Hospital Universitario, Donostia, Gipuzkoa 20014, Spain;