1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Korea.
2. Department of Pharmacology, Chonbuk National University Medical School, Jeonju, Korea.
3. Clinical Trial Center, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Korea.