V Riveiro1, A Golpe2, A Casal2, L Valdés3. 1. Pneumology Department, Hospital Clínico-Universitario, Santiago de Compostela, Spain. Electronic address: vanessa.riveiro.blanco@sergas.es. 2. Pneumology Department, Hospital Clínico-Universitario, Santiago de Compostela, Spain. 3. Pneumology Department, Hospital Clínico-Universitario, Santiago de Compostela, Spain; Interdisciplinary Pneumology Research Group, Santiago de Compostela Health Research Institutions (Instituto de Investigaciones Sanitarias de Santiago de Compostela/IDIS), Santiago de Compostela, Spain.