1. Division of Endocrinology and Metabolism; Department of Internal Medicine; Samsung Changwon Hospital; Seoul Republic of Korea
2. Department of Preventive Medicine; Ajou University School of Medicine; Suwon Republic of Korea
3. Division of Endocrinology and Metabolism; Department of Internal Medicine; Dong-A University Medical Center; Busan Republic of Korea
4. Division of Endocrinology and Metabolism; Department of Internal Medicine; Samsung Medical Center; Sungkyunkwan University School of Medicine; Seoul Republic of Korea