Cite
MLA Citation
A Pekala and R Filip. “P419 Frequency of inadequate response to anti-tumour necrosis factor therapy in patients with ulcerative colitis. Preliminary results from POLIBD study.” Journal of Crohn's and colitis, vol. 12, n.d., p. S316. http://access.bl.uk/ark:/81055/vdc_100095519479.0x00000e