Affiliation: | 1.Department of Clinical Sciences, Lund, Section of Rheumatology, Lund University, Kioskgatan 3, Lund SE-221 85, Sweden;2.Sectra AB, Teknikringen 20, Linköping, SE-583 30, Sweden;3.Department of Clinical Sciences, Lund, Center for Imaging and Physiology, Lund University, Getingevägen 4, Lund, SE-221 85, Sweden |