Cite
MLA Citation
D van der Heijde et al.. “The safety and efficacy of adding etanercept to methotrexate or methotrexate to etanercept in moderately active rheumatoid arthritis patients previously treated with monotherapy.” Annals of the rheumatic diseases, vol. 67, no. 2, 2008, pp. 182–188. http://access.bl.uk/ark:/81055/vdc_100137793018.0x00005a