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. 2021 May 7;11:682088. doi: 10.3389/fonc.2021.682088

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Copyright © 2021 Wichmann, Willner, Kuhnt, Kluge, Gradistanac, Wald, Fest, Lordick, Dietz, Wiegand and Zebralla

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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Kaplan–Meier cumulative survival analyses of neck squamous cell carcinoma of unknown primary (NSCCUP) patients of cohorts 1 and 2 for (A) overall survival; (B) tumor-specific survival; (C) survival according to non-cancer death/death from other cause; (D) disease-free survival; (E) progression-free survival; (F) Time to detection of head and neck squamous cell carcinoma primary; (G) Nodal relapse-free survival and (H) Distant metastasis-free survival. P values shown are from 2-sided log-rank tests.