Table 4.

Cochrane risk of bias assessment of all included RCTs

Author	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of outcome assessment	Incomplete data outcome	Selective reporting	Other source of bias
Flynn [32]	Low-risk	High-risk	High-risk	Low-risk	Low-risk	Low-risk	Low-risk
Javed [28]	Unclear	Unclear	High-risk	Low-risk	High-risk	Low-risk	Low-risk
Murphy [26]	Low-risk	Low-risk	Low-risk	Low-risk	Low-risk	Low-risk	Low-risk
Li [31]	Low-risk	Low-risk	Low-risk	Low-risk	Low-risk	Low-risk	Low-risk
Shen [27]	Unclear	Unclear	High-risk	Low-risk	High-risk	Low-risk	Low-risk