RT Journal Article SR Electronic T1 Defining and classifying medical error: lessons for learning JF Quality and Safety in Health Care JO Qual Saf Health Care FD BMJ Publishing Group Ltd SP 8 OP 9 DO 10.1136/qshc.2003.008987 VO 13 IS 1 A1 Sutcliffe, K M YR 2004 UL http://qualitysafety.bmj.com/content/13/1/8.abstract AB