1 Division of Gastroenterology, Department of Internal Medicine, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital and Research Institute for Endocrine Sciences, Chonbuk National University Medical School, Jeonju, Korea.
2 Department of Pathology, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital and Research Institute for Endocrine Sciences, Chonbuk National University Medical School, Jeonju, Korea.