1. Pneumology Service, Complejo Hospitalario Universitario de Santiago, Santiago de Compostela, SPAIN
2. Interdisciplinary Group of Research in Pneumology, Institute of Health Research of Santiago de Compostela (IDIS), Santiago de Compostela, SPAIN
3. Pleural Medicine Unit. Department of Internal Medicine, Arnau de Vilanova University Hospital. Lleida, SPAIN
4. Dr. Pifarré Foundation Biomedical Research Institute, IRBLLEIDA, Lleida, SPAIN