1. Department of Family Medicine, Pusan National University Hospital, Busan, Korea
2. Department of Family Medicine, Kosin University Gospel Hospital, Busan, Korea
3. Department of Internal Medicine, Pusan National University Hospital, Busan, Korea
4. Department of Family Medicine, Pusan National University School of Medicine, Yangsan, Korea
5. Department of Medical Education, Pusan National University School of Medicine, Yangsan, Korea
6. Department of Family Medicine and Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea