Flokas ME, Alevizakos M, Shehadeh F, et al.Extended-spectrum β-lactamase-producing Enterobacteriaceae colonisation in long-term care facilities: a systematic review and meta-analysis.Int J Antimicrob Agents. 2017 Nov;50(5):649-656. doi: 10.1016/j.ijantimicag.2017.08.003. Epub 2017 Aug 3.