RT Journal Article SR Electronic T1 New tumour necrosis factor inhibitors for rheumatoid arthritis: are there benefits from extending choice? JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 767 OP 769 DO 10.1136/ard.2008.105940 VO 68 IS 6 A1 Scott, David L A1 Cope, Andrew YR 2009 UL http://ard.bmj.com/content/68/6/767.abstract AB