Database	Time span	Search strategy
Central Register of Controlled Trials (CENTRAL) in the Cochrane Library	Issue 11, 2018	#1 (spontaneous near/3 bacterial near/3 peritonitis) #2 MeSH descriptor: [Liver Cirrhosis] explode all trees #3 ((hepatic or liver) and (fibrosis or cirrhosis or cirrhotic)) #4 #2 or #3 #5 #1 and #4
MEDLINE Ovid	January 1947 to November 2018	1. (spontaneous adj3 bacterial adj3 peritonitis).ti,ab. 2. exp Liver Cirrhosis/ 3. ((hepatic or liver) and (fibrosis or cirrhosis or cirrhotic)).ti,ab. 4. 2 or 3 5. 1 and 4 6. randomized controlled trial.pt. 7. controlled clinical trial.pt. 8. randomized.ab. 9. placebo.ab. 10. drug therapy.fs. 11. randomly.ab. 12. trial.ab. 13. groups.ab. 14. 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 15. exp animals/ not humans.sh. 16. 14 not 15 17. 5 and 16
Embase Ovid	January 1974 to November 2018	1. exp bacterial peritonitis/ 2. (spontaneous adj3 bacterial adj3 peritonitis).ti,ab. 3. 1 or 2 4. exp liver cirrhosis/ 5. ((hepatic or liver) and (fibrosis or cirrhosis or cirrhotic)).ti,ab. 6. 4 or 5 7. 3 and 6 8. exp crossover‐procedure/ or exp double‐blind procedure/ or exp randomized controlled trial/ or single‐blind procedure/ 9. (((((random* or factorial* or crossover* or cross over* or cross‐over* or placebo* or double*) adj blind*) or single*) adj blind*) or assign* or allocat* or volunteer*).af. 10. 8 or 9 11. 7 and 10
Science Citation Index Expanded (Web of Science)	January 1945 to November 2018	#1 TS=(spontaneous near/3 bacterial near/3 peritonitis) #2 TS=((hepatic or liver) and (fibrosis or cirrhosis or cirrhotic)) #3 TS=(random* OR rct* OR crossover OR masked OR blind* OR placebo* OR meta‐analysis OR systematic review* OR meta‐analys*) #4 #1 AND #2 AND #3
World Health Organization International Clinical Trials Registry Platform (apps.who.int/trialsearch/Default.aspx)	November 2018	spontaneous bacterial peritonitis
ClinicalTrials.gov	November 2018	cirrhosis | Interventional Studies | Spontaneous Bacterial Peritonitis | Phase 2, 3, 4
European Medical Agency (www.ema.europa.eu/ema/) and US Food and Drug Administration (www.fda.gov)	November 2018	spontaneous bacterial peritonitis