1 Pulmonologist, Medical Surgical Unit of Respiratory Diseases, Hospital Universitario Virgen del Rocio, Sevilla, Spain.
2 Pulmonologist, Medical Surgical Unit of Respiratory Diseases, Hospital Universitario Virgen del Rocio, Sevilla, Spain; Centro de Investigacion Biomedica en Red de Enfermedades Respiratorias (CIBERES), Carlos III Health Institute, Madrid, Spain. Electronic address: luisj.jara.sspa@juntadeandalucia.es.