1 Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
2 Department of Epidemiology and Medicine, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland; Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland.
3 Department of Epidemiology and Medicine, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland; Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland; Department of Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, Republic of Korea; Center for Clinical Epidemiology, Sungkyunkwan University, Samsung Medical Center, Seoul, Republic of Korea; Patient-Centered Outcomes Research Institute, Samsung Medical Center, Seoul, Republic of Korea.
4 Department of Clinical Research Design and Evaluation, SAIHST, Sungkyunkwan University, Seoul, Republic of Korea; Center for Clinical Epidemiology, Sungkyunkwan University, Samsung Medical Center, Seoul, Republic of Korea.
5 Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Patient-Centered Outcomes Research Institute, Samsung Medical Center, Seoul, Republic of Korea. Electronic address: hkts@skku.edu.