Table 2:

Quality assessments of included studies

	Random Sequence	Generation Allocation concealment	Blinding of participants and personnel reporting	Other sources of bias	Blinding of outcome assessment	Incomplete outcome	Data Selective outcome
Pam Conrad, 2012	Low Risk	Low Risk	High risk	Unclear	High risk	Low Risk	Unclear
Kianpour M, 2018	Low Risk	Low Risk	Low Risk	Unclear	Low Risk	Low Risk	Unclear
Mirghafourvand M, 2016	Low Risk	Low Risk	Low Risk	Unclear	Low Risk	Unclear	Unclear
Kianpour M 2016	Low Risk	Unclear	High risk	Yes	High risk	Low Risk	Unclear