1. Division of Rheumatology/Immunology/Allergy, Department of Internal Medicine, Armed-Forces Taichung General Hospital, Taichung, Taiwan, Republic of China.
2. Division of Rheumatology/Immunology/Allergy, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China.
3. Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China.