Nosocomial and community infections due to class A extended-spectrum β-lactamase (ESBLA)-producing Escherichia coli and Klebsiella spp. in southern Brazil gan Claudia Wollheim, Ivani Maria F Guerra, Vania D Conte, Sheila P Hoffman, Fernando J Schreiner, Ana Paula L Delamare, Afonso L Barth, Sérgio Echeverrigaray, Sérgio Olavo P da Costa

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