1. ILD Unit, Respiratory Department, University Hospital of Bellvitge, IDIBELL, University of Barcelona, Hospitalet de Llobregat, Barcelona, Spain
2. Respiratory Diseases Network Research Consortium (CIBERES), Spain
3. Primary Care Respiratory Research Unit, Instituto de Investigación Sanitaria de Baleares (IdISBa), Palma de Mallorca, Spain
4. Son Pisa Primary Care health centre, Palma de Mallorca, Spain