Won-Seok Lee1, Kyoung-Hwa Choi2. 1. Division of Rheumatology, Department of Internal Medicine, Chonbuk National University Medical School and Research Institute of Clinical Medicine of Chonbuk National University Hospital, Chonbuk National University, Jeonju, South Korea. 2. Division of Allergy and Pulmonology, Department of Internal Medicine, Presbyterian Medical Center, Jeonju, South Korea.