Otavio T Ranzani1,2, Gianluigi Li Bassi3, Antoni Torres3. 1. Department of Pneumology, Hospital Clinic of Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Ciber de Enfermedades Respiratorias (CIBERES), Barcelona, Spain. otavioranzani@yahoo.com.br. 2. Respiratory Intensive Care Unit, Pulmonary Division, Heart Institute, Hospital das Clínicas, University of São Paulo, Av. Dr. Arnaldo, 455, Laboratório de Pneumologia, 2º andar, sala 2144, São Paulo, São Paulo, 01246903, Brazil. otavioranzani@yahoo.com.br. 3. Department of Pneumology, Hospital Clinic of Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Ciber de Enfermedades Respiratorias (CIBERES), Barcelona, Spain.