Table 2. Risk of bias (RCTs).

Study	Domain
	Random sequence generation	Allocation concealment	Blinding of participants and researchers	Blinding of outcome assessment	Incomplete outcome data	Selective reporting	Other bias
Ascensão et al. [57].	Low	Unclear	High	Unclear	Low	Low	-
Clifford et al.[70].	Low	Low	Low	Unclear	Low	Low	Low
Fullagar et al. [71].	Low	Unclear	High	Unclear	Low	Low	Low
Marqués-Jiménez et al. [72].	Low	Unclear	High	Low	Low	Low	Low
Marqués- Jiménez et al. [73].	Low	Unclear	High	Unclear	Low	Low	Low