RT Journal Article SR Electronic T1 Ankylosing Spondylitis Refractory to Tumor Necrosis Factor Blockade Responds to Tocilizumab JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1527 OP 1527 DO 10.3899/jrheum.110265 VO 38 IS 7 A1 COHEN, JEAN-DAVID A1 FERREIRA, ROSANNA A1 JORGENSEN, CHRISTIAN YR 2011 UL http://www.jrheum.org/content/38/7/1527.1.abstract AB