[1] Natl Hosp Org Tokyo, Dept Connect Tissue Dis, Med Ctr, Meguroku, Japan
[2] Keio Univ, Natl Hosp Org Tokyo, Dept Connect Tissue Dis, Dept Internal Me,Med Ctr,Div Rheumatol,Sch Med, Tokyo, Japan
[3] Natl Hosp Org Tokyo, Dept Connect Tissue Dis, Med Ctr, Tokyo, Japan
[4] Keio Univ, Sch Med, Dept Connect Tissue Dis, Natl Hosp Org Toky,Med Ct,Div Rheumatol,Dept Inte, Palo Alto, CA USA