RT Journal Article SR Electronic T1 Incidence of Spondyloarthropathy in Patients with Crohn’s Disease: A Population-based Study JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2232 OP 2232 DO 10.3899/jrheum.120321.C1 VO 39 IS 11 YR 2012 UL http://www.jrheum.org/content/39/11/2232.abstract AB