Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No details were available as only the abstract was available
Allocation concealment (selection bias)	Unclear risk	No details were available as only the abstract was available
Blinding of participants and personnel (performance bias)	Unclear risk	No details were available as only the abstract was available
Blinding of outcome assessment (detection bias)	Unclear risk	No details were available as only the abstract was available
Incomplete outcome data (attrition bias)	Unclear risk	No details were available as only the abstract was available
Selective reporting (reporting bias)	Low risk	Minimal loss to follow up
Other bias	Unclear risk	No details were available as only the abstract was available