1. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Dankook University Hospital, Dankook University College of Medicine, Cheonan, South Korea.
2. Department of Pathology, Dankook University Hospital, Dankook University College of Medicine, Cheonan, South Korea.
a. http://orcid.org/0000-0002-7779-4000; b. http://orcid.org/0000-0003-0276-0786