1. Department of Family Medicine, Kyung Hee University College of Medicine, Kyung Hee University Medical Center, Seoul, Korea.
2. Center for Digital Health, Medical Science Research Institute, Kyung Hee University Medical Center, Seoul, Korea.
3. Medical Science Research Institute, Kyung Hee University Medical Center, Seoul, Korea.
4. Department of Endocrinology and Metabolism, Kyung Hee University School of Medicine, Seoul, Korea.
5. Department of Biostatistics, College of Medicine, Korea University, Seoul, Korea.