Table 4. Quality Assessment using the Cochrane Collaboration risk of bias tool.

Article	Random sequence generation	Allocation concealment	Double blinding	Attrition bias	Reporting bias	Blinding outcome assessment	Other bias
Khorvash et al. [8]	Low	Low	Low	Low	Unclear	Unclear	Low
Harris et al. [9]	Low	Low	High	Low	Low	Unclear	Low
Arthur et al. [10]	Low	Low	Low	Low	Unclear	Low	Low
Salomão et al. [11]	Low	Low	Low	Low	Unclear	Unclear	Low
Davey et al. [12]	Low	Low	Low	Unclear	Low	Low	Low
Amin et al. [13]	Low	Low	Low	Low	Unclear	Low	High
Maxwell et al. [14]	Low	High	High	Low	Low	Unclear	Low