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1 Sección de Neumología, Hospital San Pedro de Alcántara, Cáceres, España; Centro de Investigación en Red de Enfermedades Respiratorias (Ciberes), España. Electronic address: juli1949@separ.es.
1 Sección de Neumología, Hospital San Pedro de Alcántara, Cáceres, España; Centro de Investigación en Red de Enfermedades Respiratorias (Ciberes), España. Electronic address: juli1949@separ.es.