1 Department of Cardiovascular, Neural and Metabolic Sciences, IRCCS Istituto Auxologico Italiano, Piazzale Brescia 20, 20149 Milan, Italy.
2 Department of Medicine and Surgery, University of Milano-Bicocca, Piazza dell'Ateneo Nuovo, 1 - 20126, Milan, Italy.
3 Department of Nursing, Physiotherapy and Occupational Therapy, Group of Precision Medicine in Chronic Diseases, Hospital Nacional de Parapléjicos, IDISCAM, Faculty of Physiotherapy and Nursing, University of Castilla-La Mancha, Toledo, Spain.
4 Pneumology Department, Hospital Universitario Politécnico La Fe, Valencia, Spain.
5 Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Madrid, Spain.