RT Journal Article SR Electronic T1 Comparison of plasma and urinary concentrations of uric acid measured by the colorimetric phosphotungstate and enzymatic uricase methods JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 84 OP 85 DO 10.1136/ard.42.Suppl_1.84 VO 42 IS Suppl 1 A1 C. S. Higgens A1 I. K. Moss A1 J. T. Scott YR 1983 UL http://ard.bmj.com/content/42/Suppl_1/84.abstract AB