1 Pneumology Unit, Hospital Plató, Barcelona, Spain.
2 Pulmonary Division, Heart Institute (InCor) Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil.
3 Pneumology Service, Hospital La Princesa, Madrid, Spain.
4 Pneumology Service, Hospital Ramón y Cajal, Madrid, Spain.
5 Pneumology Service, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Regional Universitario de Málaga/Universidad de Málaga, Malaga, Spain.