[1] Erasmus Univ, Med Ctr, Rheumatol, Rotterdam, Netherlands
[2] Vlietland Hosp, Rheumatol, Schiedam, Netherlands
[3] Albert Schweitzer Ziekenhuis, Dordrecht, Netherlands
[4] Maasstad Hosp, Dept Rheumatol, Rotterdam, Netherlands
[5] St Franciscus Gasthuis, Rheumatol, Rotterdam, Netherlands