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