Table 2.

Risk of bias of included randomised controlled trials with the RoB 2.0 tool

Study	Randomisation	Deviations from intended interventions	Missing outcome data	Measurement of the outcome	Selection of the reported result	Overall
Abbate et al, 2015	Low	Low	Low	Some concerns	Some concerns	Some concerns
Albhaisi et al, 2020	Low	Some concerns	Low	Low	Low	Some concerns
Chhibber et al, 2017	Low	Low	Some concerns	Low	Low	Some concerns
Gujar et al, 2019	Low	Low	Low	Low	Low	Low
Levrini et al, 2013	High	Low	Low	Low	Low	High
Levrini et al, 2015	High	Some concerns	High	Low	Low	High