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. 2014 Jun 14;14:439. doi: 10.1186/1471-2407-14-439

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Copyright © 2014 Riihimäki et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Kaplan-Meier curves for metastatic (M1) and non-metastatic (M0) non-CUP lung cancer patients, compared with lung cancer deaths (according to the death certificate) of CUP patients with CUP diagnosed in specific locations (Nervous system, respiratory system, liver, bone). The upper panel (A) includes adenocarcinoma only, and the lower panel (B) depicts squamous cell cancer.