Table 2.

RoB2 (risk of bias) assessment

Author/Year	Domain 1: Randomization process	Domain 2: Deviation from the intended interventions	Domain 3: Missing outcome data	Domain 4: Measurement of the outcome data	Domain 5: Selection of the reported results	RoB-2 final quality assessment
1. Curnow et al. [15]	Some concern	Low risk	Low risk	Low risk	Low risk	Some concern
2. Rong et al. [11]	Some concern	Low risk	Low risk	Low risk	Low risk	Some concern
3. Winter et al.[16]	Some concern	Low risk	Some concern	Low risk	High risk	High risk
4. Al jundi et al. [1]	Some concern	Some concern	Low risk	Some concern	Some concern	High risk
5. Frazao [14]	unclear	High risk	unclear	Low risk	High risk	High risk
6. Jackson et al. [10]	Some concern	Low risk	Low risk	Low risk	Low risk	Some concern
7. Helderman et al. [13]	Some concern	Low risk	Low risk	Low risk	Low risk	Some concern
8. Schwarz et al. [12]	High risk	Some concern	Low risk	Some concern	Some concern	High risk