Fig. 2

A risk of bias summary plot for non-randomized studies with bar chart of the distribution of risk-of-bias judgments for all included studies (n = 28) [2,3,4,5, 8, 14, 16, 20, 23, 25,26,27, 31, 33, 34, 39, 41, 42, 45,46,47, 49, 59,60,61,62,63,64] cross the domains of the ROBINS-I tool, shown in percentages (%) is shown. In the bottom, an overall risk of bias, which represents the collated risk-of-bias judgments for all domains, is depicted