1. Department of Family Medicine, Daedong Hospital, Busan, South Korea.
2. Department of Medical Education, Pusan National University School of Medicine, Yangsan, South Korea.
3. Family Medicine Clinic, Pusan National University Yangsan Hospital, Yangsan, South Korea.
4. Research Institute of Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea.