1. Division of Endocrinology and Metabolism, Asan Medical Center, University of Ulsan College of Medicine, 138-736 Seoul, Korea
2. Department of Biostatistics, Asan Medical Center, University of Ulsan College of Medicine, 138-736 Seoul, Korea
3. Department of Nursing, Eulji University, 461-713 Seongnam, Korea
4. Department of Preventive Medicine, Asan Medical Center , University of Ulsan College of Medicine, 138-736, Seoul, Korea
5. Health Screening and Promotion Center, Asan Medical Center, University of Ulsan College of Medicine,138-736 Seoul, Korea
6. Division of Cardiology, Asan Medical Center, University of Ulsan College of Medicine, 138-736 Seoul, Korea