1. Department of Family Medicine and Biomedical Research Institute, Pusan National University Hospital , Busan 49241 , Republic of Korea
2. Department of Family Medicine , Pusan National University School of Medicine, Yangsan 50612, Republic of Korea
3. Department of Family Medicine, Pusan National University School of Medicine , Yangsan 50612, Republic of Korea
4. Department of Family Medicine, Pusan National University Yangsan Hospital , Yangsan 50612, Republic of Korea
5. Department of Medical Education, Pusan National University School of Medicine , Yangsan 50612 , Republic of Korea
6. Family Medicine Clinic, Obesity, Metabolism and Nutrition Center and Research Institute of Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital , Yangsan 50612 , Korea