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. 2018 Feb 13;7(1):39–70. doi: 10.1007/s40121-018-0186-1

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© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 1 — Assessment of search results to identify key papers for review and data extraction. Asterisk did not meet inclusion criteria in relation to study population or design (see “Selection”). Hash did not include reports of: Clostridium difficile infection (CDI) epidemiology (incidence/prevalence); CDI risk factors; CDI definitions; diagnostic and laboratory test methods; CDI strains; length of hospital stay; intensive care unit admission; CDI recurrence; or mortality. Dagger one identified article was an erratum of a previously identified study, therefore the study was counted only once