[1] Univ Zurich, Univ Zurich Hosp, Dept Rheumatol, Zurich, Switzerland
[2] Med Univ Vienna Austria, Dept Biomed Imaging & Image Guided Therapy, Vienna, Austria
[3] Med Univ Vienna, Dept Biomed Imaging & Image Guided Therapy, Vienna, Austria
[4] Univ Hosp Oslo, Dept Radiol, Oslo, Norway
[5] Univ Oslo, Oslo, Norway
[6] Univ Zurich, Univ Hosp Zurich, Dept Rheumatol, Zurich, Switzerland
[7] Univ Hosp Oslo, Dept Rheumatol, Oslo, Norway
[8] Univ Hosp Oslo, Dept Resp Dis, Oslo, Norway
[9] Univ Zurich, Univ Zurich Hosp, Dept Pulmonol, Zurich, Switzerland
[10] Med Univ Vienna, Vienna, Austria
[11] Karolinska Inst Sweden, Vienna, Austria
[12] Oslo Univ Hosp, Oslo, Norway
[13] Oslo Univ Hosp, Dept Rheumatol, Oslo, Norway
[14] Univ Zurich, Univ Zurich Hosp, Dept Radiol, Zurich, Switzerland
[15] Med Univ Vienna, Div Rheumatol, Vienna, Austria
[16] Oslo Univ Hosp, Dept Rheumatol, Oslo, Norway