1. Arthritis guidelines for the management of rheumatoid arthritis: 2002 update;ACR Subcommittee on Rheumatoid Arthritis Guidelines;Arthritis and Rheumatism,2002
2. Methotrexate in rheumatoid arthritis. Toxic effects as the major factor in limiting long-term treatment;Alarcóan;Arthritis and Rheumatism,1989
3. Validating a dipstick method for detecting recent smoking;Ariti;Cancer Epidemiology, Biomarkers and Prevention,2002
4. Chakravarty K, McDonald H, Pullar T, Taggart A, Chalmers R, Oliver S, Mooney J, Somerville M, Bosworth A, Kennedy T, on behalf of the British Society for Rheumatology, British Health Professionals in Rheumatology Standards, Guidelines and Audit Working Group in consultation with the British Association of Dermatologists (BAD) (2008) Available at http://rheumatology.oxfordjournals.org/cgi/content/full/kel216a/DC1 [Accessed 11 August 2008].
5. Molecular therapeutics: Methotrexate and its mechanism of action;Cronstein;Arthritis and Rheumatism,1996