Affiliation: | 1. Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea;2. Department of Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, Korea;3. Center for Clinical Epidemiology, Samsung Medical Center, Seoul, Korea;4. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea;5. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, South Korea;6. Department of Epidemiology and Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA;7. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, KoreaJ.C. and H.Y.P. have contributed equally to this study. |