Database	Time span	Search strategy
Cochrane Hepato‐Biliary Group Controlled Trials Register	February 2017	(endoscopic sphincterotom* OR EST) AND rendezvous AND (cholelithiasis OR gallstone* OR gallbladder stone) AND ((common bile duct OR choledoch*) AND (stone* OR calcul*))
The Cochrane Central Register of Controlled Trials (CENTRAL) in the Cochrane Library	2017, Issue 1	#1 MeSH descriptor: [Sphincterotomy, Endoscopic] explode all trees #2 endoscopic sphincterotom* or EST #3 #1 or #2 #4 MeSH descriptor: [Cholecystectomy, Laparoscopic] explode all trees #5 rendezvous #6 #4 or #5 #7 MeSH descriptor: [Cholelithiasis] explode all trees #8 cholelithiasis or gallstone* or gallbladder stone #9 #7 or #8 #10 MeSH descriptor: [Gallstones] explode all trees #11 (common bile duct or choledoch*) and (stone* or calcul*) #12 #10 or #11 #13 #3 and #6 and #9 and #12
MEDLINE Ovid	1946 to February 2017	1. exp Sphincterotomy, Endoscopic/ 2. (endoscopic sphincterotom* or EST).mp. [mp=protocol supplementary concept, rare disease supplementary concept, title, original title, abstract, name of substance word, subject heading word, unique identifier] 3. 1 or 2 4. exp Cholecystectomy, Laparoscopic/ 5. rendezvous.mp. [mp=protocol supplementary concept, rare disease supplementary concept, title, original title, abstract, name of substance word, subject heading word, unique identifier] 6. 4 or 5 7. exp Cholelithiasis/ 8. (cholelithiasis or gallstone* or gallbladder stone).mp. [mp=protocol supplementary concept, rare disease supplementary concept, title, original title, abstract, name of substance word, subject heading word, unique identifier] 9. 7 or 8 10. exp Gallstones/ 11. ((common bile duct or choledoch*) and (stone* or calcul*)).mp. [mp=protocol supplementary concept, rare disease supplementary concept, title, original title, abstract, name of substance word, subject heading word, unique identifier] 12. 10 or 11 13. 3 and 6 and 9 and 12 14. (random* or blind* or placebo* or meta‐analysis).mp. [mp=protocol supplementary concept, rare disease supplementary concept, title, original title, abstract, name of substance word, subject heading word, unique identifier] 15. 13 and 14
Embase Ovid SP	1974 to February 2017	1. exp endoscopic sphincterotomy/ 2. (endoscopic sphincterotom* or EST).mp. [mp=title, abstract, subject headings, heading word, drug trade name, original title, device manufacturer, drug manufacturer] 3. 1 or 2 4. exp CHOLECYSTECTOMY/ 5. rendezvous.mp. [mp=title, abstract, subject headings, heading word, drug trade name, original title, device manufacturer, drug manufacturer] 6. 4 or 5 7. exp CHOLELITHIASIS/ 8. (cholelithiasis or gallstone* or gallbladder stone).mp. [mp=title, abstract, subject headings, heading word, drug trade name, original title, device manufacturer, drug manufacturer] 9. 7 or 8 10. exp gallstone/ 11. ((common bile duct or choledoch*) and (stone* or calcul*)).mp. [mp=title, abstract, subject headings, heading word, drug trade name, original title, device manufacturer, drug manufacturer] 12. 10 or 11 13. 3 and 6 and 9 and 12 14. (random* or blind* or placebo* or meta‐analysis).mp. [mp=title, abstract, subject headings, heading word, drug trade name, original title, device manufacturer, drug manufacturer] 15. 13 and 14
Science Citation Index EXPANDED Web of Science	1900 to February 2017	#5 #4 AND #3 AND #2 AND #1 #4 TS=((common bile duct or choledoch*) and (stone* or calcul*)) #3 TS=(cholelithiasis or gallstone* or gallbladder stone) #2 TS=(rendezvous) #1 TS=(endoscopic sphincterotom* or EST)