Table 3.

Quality assessment of the included randomized controlled trials.

First author, year of publication	Selection bias	Performance bias	Detection bias	Attrition bias	Reporting bias	Other bias	Risk of bias
Azar et al, 2016 [19]	Low	High	Unclear	Low	Low	Low	Moderate
Luley et al, 2014 [23]	Unclear	High	High	Low	Unclear	Low	High
Mann et al, 2016 [24]	High	High	High	Low	Low	Unclear	High
Oh et al, 2015 [25]	Low	Unclear	Unclear	Low	Low	Low	Low
Petrella et al, 2014 [26]	High	High	High	Low	Low	Unclear	High