[1] Complejo Hosp Clin Univ Santiago de Compostela, Serv Neumol, Santiago De Compostela, Spain
[2] Inst Invest Sanitarias Santiago IDIS, Grp Interdisciplinar Invest Neumol, Santiago De Compostela, Spain
[3] Complejo Hosp Clin Univ Santiago de Compostela, Serv Anal Clin, Santiago De Compostela, Spain