Table 2.

Quality assessment of the randomized controlled trials included in the meta-analysis based on the risk of bias tool recommended by the Cochrane Collaboration

Study	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other bias
Ottini et al. [17]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk
Torrens et al. [6]	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk	Low risk