E Padrão1, C Melo2, G Fernandes3, A Magalhães4. 1. Pulmonology Department, Centro Hospitalar de São João, Porto, Portugal. Electronic address: eva.padrao@gmail.com. 2. Department of Obstetrics and Gynecology, 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. 4. Pulmonology Department, Centro Hospitalar de São João, Porto, Portugal.