“…NC was generally applied in most of the included studies. Twelve studies independently analyzed the effects of NC (21,26,34,35,37,38,42,(44)(45)(46)(47)50), another 11 studies analyzed the effects of neoadjuvant chemo-radiation (NCR) (24,(27)(28)(29)32,33,(39)(40)(41)44,49), and another four studies investigated the association between NR and BPF risk (23,46,48,50). Besides, the remaining studies (22,25,30,31,36,43) enrolled both NC cases and NR cases but analyzed them together, without providing any extractable detail on each strategy.…”