RT Journal Article SR Electronic T1 Reduction in haemoglobin after knee joint surgery. JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 582 OP 584 DO 10.1136/ard.32.6.582 VO 32 IS 6 A1 Pattison, E A1 Protheroe, K A1 Pringle, R M A1 Kennedy, A C A1 Dick, W C YR 1973 UL http://ard.bmj.com/content/32/6/582.abstract AB