So Yeon Kim, MDa ∙ Gerard A. Silvestri, MD, MSb ∙ Yeon Wook Kim, MD, PhDc ∙ Roger Y. Kim, MD, MSCEd ∙ Sang-Won Um, MD, MPH, PhDe ∙ Yunjoo Im, MDe ∙ Jung Hye Hwang, MDf ∙ Seung Ho Choi, MD, PhDg ∙ Jung Seop Eom, MD, PhDh ∙ Kang Mo Gu, MDi ∙ Yong-Soo Kwon, MD, PhDj ∙ Shin Yup Lee, MD, PhDk ∙ Hyun Woo Lee, MD, PhDl ∙ Dong Won Park, MD, PhDm ∙ Yeonjeong Heo, MDn ∙ Seung Hun Jang, MD, PhDo ∙ Kwang Yong Choi, MDo ∙ Yeol Kim, MD, PhDp ∙ Young Sik Park, MD, PhDa
aDivision of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea
bDivision of Pulmonary and Critical Care Medicine, Medical University of South Carolina, Charleston, SC, United States
cDivision of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea
dDivision of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Pennsylvania, Philadelphia, PA, United States
eDivision of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
fCenter for Health Promotion, Samsung Medical Center, Seoul, South Korea
gDepartment of Internal Medicine, Healthcare Research Institute, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, South Korea
hDepartment of Internal Medicine, Pusan National University School of Medicine, Busan, South Korea
iDepartment of Internal Medicine, Chung-Ang University College of Medicine, Seoul, South Korea
jDepartment of Internal Medicine, Chonnam National University Hospital, Gwangju, South Korea
kDepartment of Internal Medicine, Kyungpook National University School of Medicine, Kyungpook National University Chilgok Hospital, Daegu, South Korea
lDivision of Respiratory and Critical Care Medicine, Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, South Korea
mDivision of Pulmonary Medicine and Allergy, Department of Internal Medicine, Hanyang University College of Medicine, Seoul, South Korea
nDepartment of Internal Medicine, School of Medicine, Kangwon National University, Chuncheon, South Korea
oDepartment of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Anyang, South Korea
pDepartment of Cancer Control, Graduate School of Cancer Science and Policy, National Cancer Center, Goyang, South Korea
Correspondence: Young Sik Park, MD, PhD