title: Indirect Comparison of Exacerbation Frequency Between Aclidinium and Tiotropium in Patients With Chronic Obstructive Pulmonary Disease.
authors.affiliation: Korea University, Yeongi-gun, South Korea.
authors.forename: H
authors.initials: H
authors.lastname: Lee
authors.affiliation: Korea University, Yeongi-gun, South Korea.
authors.forename: S E
authors.initials: SE
authors.lastname: Choi
authors.affiliation: Korea University, Yeongi-gun, South Korea.
authors.forename: E
authors.initials: E
authors.lastname: Bae
authors.affiliation: Korea University, Yeongi-gun, South Korea.
authors.forename: E A
authors.initials: EA
authors.lastname: Lim
authors.affiliation: Korea University, Yeongi-gun, South Korea.
authors.forename: J
authors.initials: J
authors.lastname: Kim
authors.affiliation: Korea University, Yeongi-gun, South Korea.
authors.forename: H
authors.initials: H
authors.lastname: Park