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. 2018 Jul 23;8:273. doi: 10.3389/fonc.2018.00273

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Copyright © 2018 Deschuymer, Dok, Laenen, Hauben and Nuyts.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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New proposed risk group model: classification into three risk-of-death categories. Stage groups I-III are according to the TNM 8th edition. HPV, Human papillomavirus; PY, smoking pack years; ACE27, Adult Comorbidity evaluation 27.