1 Department of Internal Medicine, Chonbuk National University Medical School, Jeonju, Korea.
2 Department of Internal Medicine, Chonbuk National University Medical School, Jeonju, Korea. ; Department of Microbiology, Chonbuk National University Medical School, Jeonju, Korea.
3 Clinical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Korea.
4 Department of Internal Medicine, Chonbuk National University Medical School, Jeonju, Korea. ; Clinical Research Institute, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Korea.