1 Division of Endocrinology and Metabolism, Department of Internal Medicine, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Chonbuk National University Medical School, Geonji-Ro 20, Deokjin-Gu, Jeonju, 561-712, Republic of Korea.
2 Department of Biochemistry, Chonbuk National University Medical School, Jeonju, Republic of Korea.
3 Department of Internal Medicine, Presbyterian Medical Center, Jeonju, Republic of Korea.
4 Division of Endocrinology and Metabolism, Department of Internal Medicine, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Chonbuk National University Medical School, Geonji-Ro 20, Deokjin-Gu, Jeonju, 561-712, Republic of Korea. parkjh@jbnu.ac.kr.