Database	Time span	Search strategy
The Cochrane Hepato‐Biliary Group Controlled Trials Register	October 2016	(radiotherapy) AND (hepato* or liver*) and (carcinom* or cancer* or neoplasm* or malign* or tumo*))
Cochrane Central Register of Controlled Trials (CENTRAL) in the Cochrane Library	2016, Issue 9	#1 radiotherapy #4 MeSH descriptor: [liver neoplasms] explode all trees #5 MeSH descriptor: [Hepatocellular carcinoma] explode all trees #6 MeSH descriptor: [carcinoma,liver] explode all trees #7 (liver* or hepato*) and (carcinom* or cancer* or neoplasm* or malign* or tumo*) #8 #2 or #3 or #4 or #5 or #6 or #7 #9 #1 and #8
MEDLINE (OvidSP)	1946 to October 2016	1. radiotherapy.mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier] 4. exp liver Neoplasms/ 5. hepatocellular carcinoma/ 6. carcinoma, liver/ 7. ((liver* or hepato*) and (carcinom* or cancer* or neoplasm* or malign* or tumo*)).mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier] 8. 2 or 3 or 4 or 5 or 6 or 7 9. 1 and 8 10. (random* or blind* or placebo* or meta‐analys*).mp. [mp=title, abstract, original title, name of substance word, subject heading word, keyword heading word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier] 11. 9 and 10
Embase (OvidSP)	1974 to October 2016	1. exp radiotherapy/ 2. radiotherapy.mp. [mp=title, abstract, subject headings, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword] 3. 1 or 2 6. exp liver tumor/ 7. exp liver carcinoma/ 8. ((liver* or hepato*) and (carcinom* or cancer* or neoplasm* or malign* or tumo*)).mp. [mp=title, abstract, subject headings, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword] 9. 4 or 5 or 6 or 7 or 8 10. 3 and 9 11. (random* or blind* or placebo* or meta‐analys*).mp. [mp=title, abstract, subject headings, heading word, drug trade name, original title, device manufacturer, drug manufacturer, device trade name, keyword] 12. 10 and 11
Science Citation Index Expanded (Web of Science)	1900 to October 2016	#7 #6 AND #5 #6 TS=(random* or blind* or placebo* or meta‐analys*) #5 #4 AND #1 #4 #3 OR #2 #3 TS=((liver* or hepato*) and (carcinom* or cancer* or neoplasm* or malign* or tumo*)) #1 TS=(radiotherapy)