Chungbuk National University - Chungbuk National University Hospital, Chungbuk National University - Chungbuk National University Hospital, Soongsil University - Department of Statistics and Actuarial Science, Hallym University, Inje University, Sungkyunkwan University - Samsung Medical Center and Hanyang University - Division of Pulmonary Medicine and Allergy

Gimpo Woori Hospital, Seoul National University - Institute of Health Policy and Management, University of Ulsan - Department of Thoracic and Cardiovascular Surgery, National Rehabilitation Center, Seoul - Department of Healthcare and Public Health Research, Yonsei University - Department of Health Administration, University of Wisconsin-Madison - School of Nursing, Sungkyunkwan University - Samsung Medical Center and The Catholic University of Korea - Department of Preventative Medicine