1. Unit of Diagnostic and Interventional Bronchology, Careggi University Hospital, Florence, Italy
2. Unit of Thoracic Surgery, Careggi University Hospital, Florence, Italy
3. Unit of Infectious Diseases, Careggi University Hospital, Florence, Italy
4. Unit of Respiratory Disease, University Hospital, Modena, Italy
5. Section of Respiratory Medicine, Department of Internal Medicine, Careggi University Hospital, Florence, Italy