TABLE 4.

Risk of bias, assessed by the revised Cochrane risk of bias tool for randomized trials (RoB 2): N = 9

Study	Random sequence generation	Allocation concealment	Blinding of participants and personnel	Blinding of providers	Blinding of outcome assessment	Blinding of data analysis	Incomplete outcome data	Selective reporting	Other bias	Overall
Ki, 2009. 39	High	High	High	High	High	High	High	High	High	High
Baker, 2011. 35	High	High	High	High	High	High	High	High	High	High
Otsuka et al., 2012. 42	High	High	High	High	High	High	High	High	High	High
Chan et al., 2013. 40	High	High	High	High	High	High	High	High	High	High
Kaplan et al., 2014. 36	High	High	High	High	High	High	High	High	High	High
Cheng et al., 2015. 42	Low	Low	High	High	High	High	Low	Some concerns	High	High
Neumeier et al., 2017. 27	High	High	High	High	High	High	High	High	High	High
Cook et al., 2017. 37	High	High	High	High	High	High	High	High	High	High
Ligon, 2019. 38	Some concerns	High	High	High	High	High	High	Some concerns	High	High