Methotrexate therapy in rheumatoid arthritis after failure to sulphasalazine: to switch or to add?
Rheumatology (Oxford). 2009 Oct;48(10):1247-53. doi: 10.1093/rheumatology/kep158. Epub 2009 Jul 28.
Rheumatology (Oxford). 2009.
PMID: 19638454
Clinical Trial.