M Grafino1, L Ferreira2, L Telo2, S Mira3, M Alvoeiro4, C Bárbara5. 1. Pneumology Department, Pulido Valente Hospital, North Lisbon Hospital Center, Lisbon, Portugal. Electronic address: mgrafino@gmail.com. 2. Pneumology Department, Pulido Valente Hospital, North Lisbon Hospital Center, Lisbon, Portugal. 3. Anatomopathology Department, Pulido Valente Hospital, North Lisbon Hospital Center, Lisbon, Portugal. 4. Thoracic Surgery Department, Pulido Valente Hospital, North Lisbon Hospital Center, Lisbon, Portugal. 5. Pneumology Department, Pulido Valente Hospital, North Lisbon Hospital Center, Lisbon, Portugal; Environmental Health Institute (ISAMB), Faculty of Medicine, University of Lisbon, Portugal.