title: The exception does not prove the rule.
authors.affiliation: Servicio de Neumología, Complejo Hospitalario Universitario de Pontevedra, Pontevedra, España. Electronic address: adolfo.baloira.villar@sergas.es.
authors.forename: Adolfo
authors.initials: A
authors.lastname: Baloira Villar
authors.affiliation: Servicio de Neumología, Complejo Hospitalario Universitario de Pontevedra, Pontevedra, España.
authors.forename: Marta
authors.initials: M
authors.lastname: Núñez Fernández
mesh_terms: D006801:Humans; D008511:Medicine; D010825:Physics