[1] Hosp Arquitecto Marcide, Pneumol Dept, Ferrol, Spain
[2] Hosp Arquitecto Marcide, Cardiol Dept, Ferrol, Spain
[3] Complejo Hosp Univ Coruna, Internal Med Dept, Cardiol Dept, La Coruna, Spain
[4] Univ Santiago de Compostela, Dept Biochem & Mol Biol, Santiago De Compostela, Spain
[5] Clin Biochem Lab Univ Hosp Complex, Santiago De Compostela, Spain