RT Journal Article SR Electronic T1 Perianal Crohn Disease after Treatment with Rituximab for Active Granulomatosis with Polyangiitis JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 2199 OP 2200 DO 10.3899/jrheum.160456 VO 43 IS 12 A1 DAVID FRASER A1 STEPHEN BOYLE A1 NICOLE AMFT YR 2016 UL http://www.jrheum.org/content/43/12/2199.1.abstract AB