%0 Journal Article %T Association of Bile Acid and Pepsin Micro-aspiration with Chronic Obstructive Pulmonary Disease Exacerbation %A Ahmad Shafahi %A Fatemeh Abbasi %A Mitra Samareh Fekri %A Rostam Yazdani %A Seyed-Mehdi Hashemi-Bajgani %J Archive of "Tanaffos". %D 2019 %K COPD %K Aspiration %K Bile acid %K Pepsin %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6690328/