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C. G. Giske, A. S. Sundsfjord, G. Kahlmeter, N. Woodford, P. Nordmann, D. L. Paterson, R. Canton, T. R. Walsh. "Redefining extended-spectrum -lactamases: balancing science and clinical need--authors' response." Journal of Antimicrobial Chemotherapy 64.1 (2009) 213-215