This article refers to:
Han MK. Int J Chron Obstruct Pulmon Dis. 2020;15: 711–721
Page 718, Disclosure section, the disclosure statement was incomplete, the correct statement is “MeiLan K Han reports consulting fees from Boehringer Ingelheim, GlaxoSmithKline, AstraZeneca, Merck, Mylan and Novartis. She also reports research support from Novartis and Sunovion. Boehringer Ingelheim also supported conduction of the systematic search. The author reports no other conflicts of interest in this work.”
The author apologizes for this error.