1Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
2Department and Research Institute of Rehabilitation Medicine, Severance Rehabilitation Hospital, Yonsei University College of Medicine, Seoul, Korea
3Division of Nursing, Pediatric Intensive Care Unit, Severance Hospital, Seoul, Korea
4Division of Nursing, Neurointensive Care Unit, Severance Hospital, Seoul, Korea
5Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea
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