%0 Journal Article %T The clinical efficacy of AG NPP709 (Synatura ® ) in patients with chronic bronchitis type stable chronic obstructive pulmonary disease %A Lee, Eung Gu %A Rhee, Chin Kook %J Journal of Thoracic Disease %D 2020 %B 2020 %9 %! The clinical efficacy of AG NPP709 (Synatura ® ) in patients with chronic bronchitis type stable chronic obstructive pulmonary disease %K %X %U https://jtd.amegroups.org/article/view/38295 %V 12 %N 5 %P 2435-2442 %@ 2077-6624