R Gomes1, H Dabó2, H Queiroga3, V Hespanhol3. 1. Pulmonology Department, Hospital Sousa Martins, Unidade Local de Saúde, Guarda, Portugal; Faculty of Health Sciences, University of Beira Interior, Covilhã, Portugal. Electronic address: gomes.rita.dm@gmail.com. 2. Pulmonology Department, Centro Hospitalar de São João, Porto, Portugal. 3. Pulmonology Department, Centro Hospitalar de São João, Porto, Portugal; Faculty of Medicine, University of Porto, Porto, Portugal.