“…Risk of bias is summarized in Supplementary Table 1 of the (cohort or case-control studies) and Supplementary Figure 1 of the (RCT studies). Among the 57 included studies, 22 were from North America ( 4 , 9 , 15 , 16 , 24 , 26 , 28 , 30 , 31 , 33 , 34 , 40 , 42 – 44 , 48 – 50 , 54 , 59 , 61 , 62 ), 18 were from Asia ( 5 , 7 , 19 , 21 – 23 , 25 , 36 – 38 , 41 , 46 , 47 , 51 , 52 , 58 , 64 , 67 ), 15 were from European countries ( 6 , 17 , 18 , 20 , 27 , 32 , 35 , 45 , 53 , 55 – 57 , 60 , 65 , 66 ), one was from South America ( 29 ), one was Africa ( 39 ). A total of 12 studies could not be used for analysis of the prevalence of RRT, seven of which only reported on RRT patients ( 9 , 18 , 34 , 37 , 38 , 43 , 45 ), four of which were RCT studies ( 40 , 41 , 51 ,…”