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APA Citation
van Roon, J. A. G., Jacobs, K., Verstappen, S., Bijlsma, J., & Lafeber, F. (2008). reduction of serum interleukin 7 levels upon methotrexate therapy in early rheumatoid arthritis correlates with disease suppression. Annals of the rheumatic diseases, 67(7), 1054–1055. http://access.bl.uk/ark:/81055/vdc_100135547045.0x000060