RT Journal Article SR Electronic T1 Approaches to medical audit. JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 1 OP 3 DO 10.1136/jech.45.1.1 VO 45 IS 1 A1 A Hopkins YR 1991 UL http://jech.bmj.com/content/45/1/1.abstract AB