RT Journal Article SR Electronic T1 The purchaser role in provider quality: lessons from the United States. JF Quality in Health Care JO Qual Health Care FD BMJ Publishing Group Ltd SP 65 OP 66 DO 10.1136/qshc.3.2.65 VO 3 IS 2 A1 Thomson, R YR 1994 UL http://qualitysafety.bmj.com/content/3/2/65.abstract AB