1. Department of Family Medicine and Biomedical Research Institute, Pusan National University Yangsan Hospital, Yangsan 50612, Republic of Korea
2. Department of Family Medicine, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
3. Department of Medical Education, Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
4. Department of Family Medicine, Pusan National University Hospital, Busan 49241, Republic of Korea