[1
]
Department of Pulmonary and Critical Care Medicine, Kangdong Sacred Heart Hospital,
Hallym University College of Medicine, Seoul, Republic of Korea.
[2
]
Department of Internal Medicine, Konkuk University School of Medicine, Konkuk, Republic
of Korea.
[3
]
Department of Internal Medicine, Seoul St Mary's Hospital, Catholic University of
Korea, Seoul, Republic of Korea.
[4
]
Department of Internal Medicine, Yeouido St Mary's Hospital, Catholic University of
Korea, Seoul, Republic of Korea.
[5
]
Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic
of Korea.
[6
]
Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University
of Ulsan College of Medicine, Republic of Korea.
[7
]
Department of Internal Medicine, School of Medicine, Ewha Womans University, Seoul,
Republic of Korea.
[8
]
Department of Clinical Research Support, National Strategic Coordinating Center for
Clinical Research, Seoul, Republic of Korea.
[9
]
Department of Nursing, College of Medicine, Chosun University, Gwangju, Republic of
Korea.