Table 2. Quality assessment table.

Study ID	Method of Random Sequence Generation (Selection Bias)	Method of Allocation Concealment (Selection Bias)	Incomplete Outcome Data/Loss of participants to follow up (Attrition Bias)	Blinding of Participants and Personnel (Performance Bias)	Blinding of Outcome Assessment (Detection Bias)	Selective Reporting/ Intention to treat analysis (Reporting Bias)
Sanchis et al., 2016	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk
Tegn et. Al, 2016	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk
Wallentin et al., 2016	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk
Puymirat et al., 2012	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk
Savonnito, et al, 2012	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk
Bach et al., 2004	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk	Low Risk