TY - JOUR TI - The Relationship Between Causative Microorganisms and Airway Obstruction in Patients with COPD Exacerbation AU - Çakmak, M.E. JO - European Archives of Medical Research PY - 2019 VL - 35 SP - 88 EP - 91 DO - 10.4274/eamr.galenos.2018.34467 ER -