[1] Swedish Med Ctr, Seattle, WA USA
[2] Univ Washington, Seattle, WA 98195 USA
[3] Tufts Univ, Sch Med, Boston, MA 02111 USA
[4] Leiden Univ, Med Ctr, Leiden, Netherlands
[5] St Vincents Univ Hosp, Dept Rheumatol, Dublin, Ireland
[6] Univ Coll Dublin, Dublin, Ireland
[7] Bristol Myers Squibb, Princeton, NJ USA
[8] Bristol Myers Squibb, Braine Lalleud, Belgium
[9] Univ Toronto, Rheumatol, Toronto, ON, Canada
[10] Toronto Western Hosp, Toronto, ON, Canada