RT Journal Article SR Electronic T1 Why clinical research needs medical audit. JF Quality in Health Care JO Qual Health Care FD BMJ Publishing Group Ltd SP 1 OP 2 DO 10.1136/qshc.2.1.1 VO 2 IS 1 A1 S J Proctor YR 1993 UL http://qualitysafety.bmj.com/content/2/1/1.abstract AB