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. 2020 Oct 29;10:584072. doi: 10.3389/fonc.2020.584072

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Copyright © 2020 Yang, Guan, Liu, Wei, Zhao, Chen, Liu, Yang, Jiang and Wang

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 curves for the overall survival (OS) and rectal cancer-specific survival (RCSS) of primary rectal cancer only (PRCO) patients versus those with second primary rectal cancer (SPRC; with radiotherapy [RT] or without radiotherapy [NRT]). (A) OS of PRCO versus NRT-SPRC patients. (B) OS of PRCO versus RT-SPRC patients. (C) RCSS of PRCO versus NRT-SPRC patients. (D) RCSS of PRCO versus RT-SPRC patients.