[1] Lillehammer Univ Coll, Okorg, Lillehammer, Norway
[2] Prof Fagerhols Res Lab, Oslo, Norway
[3] Akershus Univ Hosp, Lorenskog, Norway
[4] Hosp Rheumat Dis, Lillehammer, Norway
[5] Univ Hosp North Norway, Dept Cardiothorac & Vasc Surg, Tromso, Norway
[6] Brigham & Womens Hosp, Div Rheumatol Immunol & Allergy, 75 Francis St, Boston, MA 02115 USA
[7] Havard Med Sch, Boston, MA USA