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. 2016 May 18;49(1):255–262. doi: 10.4143/crt.2015.452

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Copyright © 2017 by the Korean Cancer Association

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 6. — Subgroup analysis based on the degree of previous exposure to chemo-drugs: forest plot of the hazard ratio (HR) for progression [16-19]. CI, confidence interval.