Joon Young Choi1, Chin Kook Rhee2, Sang Hyuk Kim3, Yong Suk Jo2
1Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, College of Medicine, Incheon St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea
2Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea
3Department of Internal Medicine, Division of Pulmonary, Allergy,and Critical Care Medicine, Dongguk University Gyeongju Hospital, Dongguk University College of Medicine, Gyeongju, Republic of Korea
Correspondence: Yong Suk Jo