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Table 2 PubMed search history for study phases 1–3: creating the Lost Set (run 21 April 2011)

From: OvidSP Medline-to-PubMed search filter translation: a methodology for extending search filter range to include PubMed's unique content

Search Query Items found
#3 #1 NOT #2 834
#2 (heart failure[tiab] OR left ventricular dysfunction[tiab] OR cardiomyopathy[tiab] OR left ventricular ejection fraction[tiab]) AND English[la] AND 2010[dp] AND “hasabstract” AND Medline[sb] 5995
#1 (heart failure[tw] OR left ventricular dysfunction[mh:noexp] OR cardiomyopathy[tw] OR left ventricular ejection fraction[tw]) AND English[la] AND 2010[dp] AND “hasabstract” AND Medline[sb] 6829