Oh Dong Kyu, Lee Sei Won
Department of Pulmonary and Critical Care Medicine and Clinical Research Center for Chronic Obstructive Airway Diseases, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
J Korean Med Sci. 2018 Feb 12;33(7):e57. doi: 10.3346/jkms.2018.33.e57.