“…Thirteen publications were retrospective studies [23][24][25][26][27][28][29][30][31]37,39,42,43 , three were prospective studies 34,38,40 and five were RCT 32,33,35,36,41 . Eleven studies were observational studies with non-randomized controls [23][24][25]27,[29][30][31]37,38,40,43 , and five studies had historical controls consecutive to change of practice 26,28,34,39,42 . SSI was mostly defined according to the CDC criteria 23,25,28,29,31,33,35,36,[38][39][40][41] (Table S3).…”