Table 1. Application of the RoB2 tool to assess the risk of bias in the selected studies.

Assessed domain	I	II.1	II.2	III	IV	V	Final classification
Wang et al. 18
Kumar et al. 19
Groele et al. 20
Javid et al. 21
Ho et al. 22

Some concerns

Low risk High risk

I: Bias resulting from the randomization process

II: Bias due to deviations from planned interventions

III: Bias due to lack of outcome data

IV: Outcome measurement bias

V: Bias in the selection of the reported result