Identification of a KPC-9-producing Klebsiella pneumoniae ST258 cluster among KPC-2-producing isolates of an ongoing outbreak in Northwestern Greece: a retrospective study. (May 2018) - Gartzonika, K.; Rossen, J.W.A.; Sakkas, H.; Rosema, S.; Priavali, E.; Friedrich, A.W.; Levidiotou, S.; Bathoorn, E.