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. 2015 Feb 23;10(2):e0117333. doi: 10.1371/journal.pone.0117333

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© 2015 Zhao et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 2 — (A smokers vs no-smokers; B adenocarcinomas vs non-adenocarcinomas; C stages I-II vs stages III-IV; D male vs female). Forest plot of the Relative Risk (RR) of the clinicopathological characteristics with EML4-ALK fusion gene patients. The RR estimate of each individual trial corresponds to the middle of the squares and the horizontal line gives the 95% CI. On each line, the numbers of events are represented as fractions of the total number; random choices are shown for both treatment groups. For each subgroup, the sum of the statistics, along with the summary RR are represented by the middle of the solid diamonds. A test of heterogeneity between the trials within a subgroup is given below in summary of the statistics.