Song-Yi Yu1, Kyoung Min Kim2, Kyung Pyo Kang1,3. 1. Department of Internal Medicine, Research Institute of Clinical Medicine, Chonbuk National University Medical School, Jeonju, Korea. 2. Department of Pathology, Chonbuk National University Medical School, Jeonju, Korea. 3. Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea.