1. Department of Internal Medicine Ewha Womans University Medical Center Seoul South Korea
2. Department of Internal Medicine Ewha Womans University College of Medicine Seoul South Korea
3. Department of Internal Medicine Yonsei University College of Medicine Seoul South Korea
4. Yonsei Liver Center Severance Hospital Seoul South Korea
5. Institute of Endocrine Research Yonsei University College of Medicine Seoul South Korea
6. Department of Health Promotion Yonsei University Health System Seoul South Korea