Optimal search strategies for detecting health services research studies in MEDLINE.
Wilczynski NL; Haynes RB; Lavis JN; Ramkissoonsingh R; Arnold-Oatley AE; CMAJ: Canadian Medical Association Journal = Journal De L'association Medicale Canadienne, 2004, vol. 171, issue 10, p 1179, ISSN 08203946. ISBN 08203946.
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