[1] Second Hosp Longyan, Dept Rheumatol, Longyan, Peoples R China
[2] Taichung Vet Gen Hosp, Dept Dermatol, Taichung, Taiwan
[3] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[4] Chung Shan Med Univ Hosp, Dept Internal Med, Div Allergy Immunol & Rheumatol, Taichung, Taiwan
[5] Chung Shan Med Univ, Inst Med, Taichung, Taiwan
[6] Chung Shan Med Univ, Sch Med, Taichung, Taiwan