TY - JOUR T1 - Viral etiology of exacerbations of patients with chronic obstructive pulmonary disease during the winter season JO - Medicina ClĂ­nica (English Edition) T2 - AU - Reina,Jordi AU - Sala,Ernest AU - Fraile,Pablo SN - 23870206 M3 - 10.1016/j.medcle.2019.05.038 DO - 10.1016/j.medcle.2019.05.038 UR - https://www.elsevier.es/en-revista-medicina-clinica-english-edition--462-articulo-viral-etiology-exacerbations-patients-with-S2387020620304095 ER -