Database

Period of search

Search strategy

The Cochrane Hepato‐Biliary Group Controlled Trials Register

The date when the search is performed.

(cholecystolithiasis OR cholelithiasis) AND operation*

Cochrane Central Register of Controlled Trials in The Cochrane Library (CENTRAL)

Latest Issue.

#1 CHOLELITHIASIS explode all trees (MeSH)
#2 (cholecystolithiasis or cholelithiasis)
#3 (#1 or #2)
#4 operation*
#5 (#3 and #4)

MEDLINE

1950 to the date when the search is performed.

#1 explode "Cholelithiasis"/ all subheadings
#2 cholecystolithiasis or cholelithiasis
#3 #1 or #2
#4 operation*
#5 #3 and #4
#6 random* or placebo* or blind* or meta‐analysis
#7 #5 and #6

EMBASE

1980 to the date when the search is performed.

#1 explode "cholelithiasis"/ all subheadings
#2 cholecystolithiasis or cholelithiasis
#3 #1 or #2
#4 operation*
#5 #3 and #4
#6 random* or placebo* or blind* or meta‐analysis
#7 #5 and #6

Science Citation Index Expanded (http://portal.isiknowledge.com/portal.cgi?DestApp=WOS&Func=Frame)

1945 to the date when the search is performed.

#1 TS=(cholecystolithiasis or cholelithiasis)
#2 TS=(operation*)
#3 #1 AND #2
#4 TS=(random* or placebo* or blind* or meta‐analysis)
#5 #3 AND #4