Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	The original study design is a controlled before and after trial without randomization.
Allocation concealment (selection bias)	High risk	The original study design is a controlled before and after trial without allocation concealment
Blinding of participants and personnel (performance bias)	High risk	Blinding of participants and personnel was not possible due to the nature of the intervention and study design
Blinding of outcome assessment (detection bias)	Unclear risk	No description of blinding of outcome assessment was provided
Incomplete outcome data (attrition bias)	Unclear risk	No description of incomplete outcome data was provided,
Selective reporting (reporting bias)	Low risk	No evidence of selective outcome reporting was detected
Other bias	Low risk	No other potential biases were detected.