“…Two studies blinded the investigators and subjects (Aroni et al, 2020; Garcia et al, 2019), and one study blinded the outcome measurers (Garcia et al, 2019). Seven studies (Aroni et al, 2020; Chang et al, 2020; Conchon et al, 2021; Garcia et al, 2019; Oh et al, 2017; Sebaee & Elhadary, 2017; Serato et al, 2019) were all ranked as having a low risk of attrition bias. Overall, of the seven RCTs, one study (Sebaee & Elhadary, 2017) was identified as having a high risk of bias, three as low risk (Aroni et al, 2020; Garcia et al, 2019; Serato et al, 2019) and three as medium (Chang et al, 2020; Conchon et al, 2021; Oh et al, 2017).…”