Database	Period of Search	Search Strategy
Cochrane Central Register of Controlled Trials (CENTRAL) in The Cochrane Library (Wiley)	Issue 3, 2011.	#1 Blood loss OR bleeding OR hemorrhage OR haemorrhage OR hemorrhages OR haemorrhages OR hemostasis OR haemostasis OR transfusion #2 MeSH descriptor Hemorrhage explode all trees #3 MeSH descriptor Blood Transfusion explode all trees #4 (#1 OR #2 OR #3) #5 liver OR hepatic OR hepato #6 MeSH descriptor Liver explode all trees #7 (#5 OR #6) #8 resection OR segmentectomy OR graft* OR transplant* #9 (#7 AND #8) #10 hepatectomy #11 MeSH descriptor Hepatectomy explode all trees #12 MeSH descriptor Liver Transplantation explode all trees #13 (#9 OR #10 OR #11 OR #12) #14 (#4 AND #13)
MEDLINE (Pubmed)	1990 to September 2011.	(Blood loss OR bleeding OR hemorrhage OR haemorrhage OR hemorrhages OR haemorrhages OR hemostasis OR haemostasis OR transfusion OR "Hemorrhage"[Mesh] OR "Blood Transfusion"[Mesh]) AND (((liver OR hepatic OR hepato OR “liver”[MeSH]) AND (resection OR segmentectomy OR graft* OR transplant*)) OR hepatectomy OR “hepatectomy”[MeSH] OR “Liver Transplantation”[MeSH]) AND (((randomised controlled trial [pt] OR controlled clinical trial [pt] OR randomised controlled trials [mh] OR random allocation [mh] OR double‐blind method [mh] OR single‐blind method [mh] OR clinical trial [pt] OR clinical trials [mh] OR ("clinical trial" [tw]) OR ((singl* [tw] OR doubl* [tw] OR trebl* [tw] OR tripl* [tw]) AND (mask* [tw] OR blind* [tw])) OR (placebos [mh] OR placebo* [tw] OR random* [tw] OR research design [mh:noexp]) NOT (animals [mh] NOT human [mh]))))
EMBASE (OvidSP)	1990 to September 2011.	1 (blood loss or bleeding or hemorrhage or haemorrhage or hemorrhages or haemorrhages or hemostasis or haemostasis or transfusion).af.  2 exp bleeding/ or exp blood transfusion/  3 1 or 2  4 (liver or hepatic or hepato).af.  5 (segmentectomy or resection or graft* or transplant*).af.  6 4 and 5  7 hepatectomy.af.  8 exp liver resection/ or exp liver transplantation/  9 6 or 7 or 8  10 3 and 9  11 exp crossover‐procedure/ or exp double‐blind procedure/ or exp randomised controlled trial/ or single‐blind procedure/  12 (random* or factorial* or crossover* or placebo*).af.  13 11 or 12  14 10 and 13
Science Citation Index Expanded (http://portal.isiknowledge.com/portal.cgi?DestApp=WOS&Func=Frame)	1990 to September 2011.	#1 TS=(Blood loss OR bleeding OR hemorrhage OR haemorrhage OR hemorrhages OR haemorrhages OR hemostasis OR haemostasis OR transfusion) #2 TS=(((liver OR hepatic OR hepato) AND (resection OR segmentectomy OR graft* OR transplant*)) OR hepatectomy) #3 TS=(random* OR blind* OR placebo* OR meta‐analysis) #4 #3 AND #2 AND #1
metaRegister of Controlled Trials (Current Controlled Trials)	September 2011.	(transfusion or bleeding or hemorrhage or haemorrhage) AND (liver transplant* or liver graft*)