Yu-Hisu Chen1, Chun-Chi Lu1, Hsiang-Cheng Chen2. 1. Division of Rheumatology/Immunology/Allergy, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, R.O.C. 2. Division of Rheumatology/Immunology/Allergy, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, R.O.C. hccheng@ndmctsgh.edu.tw.