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. 2016 Oct 17;11(10):e0164491. doi: 10.1371/journal.pone.0164491

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© 2016 Wang 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 credited.

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Fig 4 — (A) HPV status, (B) clinical stage, (C) nodal stage, (D) smoking status, (E) histological grade, and (F) gender were compared using categorical data analysis, and overall-survival was estimated using the Kaplan-Meier method among all 188 OPSCC cases. (G) Smoking status (among 22 HPV-associated OPSCC patients) and (H) TP53 exons 5–8 mutation status (among 43 sequencing specimen) were compared by categorical data analysis, and overall-survival was estimated using the Kaplan-Meier method.