“…Overall, twenty SRs without meta-analysis [ 4 , 5 , 6 , 7 , 8 , 9 , 12 , 13 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ] and nine SRs with meta-analysis were included [ 10 , 11 , 14 , 15 , 34 , 35 , 36 , 37 , 38 ] ( Table 1 ). Multiple sub-topics were investigated, such as REP protocols and outcomes [ 4 , 5 , 7 , 9 , 11 , 12 , 13 , 14 , 15 , 22 , 27 , 29 , 36 ], solely REP protocols [ 30 , 37 ], solely outcomes [ 6 , 8 , 10 , 23 , 28 , 38 ], and stem cells on REP [ 24 , 25 , ...…”