Figure 2

(A) Risk of bias within the included studies (24 studies, 1707 patients). (B) Risk of bias across included studies. The risk of bias was unclear for most of the studies. Data collected from RevMan 5.3 software.

(A) Risk of bias within the included studies (24 studies, 1707 patients). (B) Risk of bias across included studies. The risk of bias was unclear for most of the studies. Data collected from RevMan 5.3 software.