“…The reviewed studies had some limitations that can provide clues for future research (Shamseer et al, 2015). Small sample sizes (Battikh et al, 2017; Brkic et al, 2017; Borgmann et al, 2018; Chen et al, 2019; Gorgulho et al, 2020; Gu et al, 2018; Li et al, 2019), single-centre studies (Chen et al, 2019; Kong et al, 2019; Li et al, 2019; Madueno et al, 2017), small number of environmental samples (Decraene et al, 2018; Yan et al, 2019) and information on antimicrobial consumption limited to facilities records (Cienfuegos-Gallet et al, 2019) were indicated as limitations. Unknown CREC and CRKP transmission routes (Borgmann et al, 2018; Li et al, 2019) were also highlighted as relevant limitations as well as the retrospective (Chen et al, 2019; Madueno et al, 2017; Spencer et al, 2019) and observational (Decraene et al, 2018; Gorgulho et al, 2020) nature of data collection.…”