Unadjusted analysis for 5-year OS, DSS, LRFS, and DMFS rates.

<p>Footnote: OS, overall survival; DSS, disease-specific survival; LRFS, local-regional recurrent free survival; DMFS, distant metastasis free survival. Other abbreviation as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0068660#pone-0068660-t001" target="_blank">Table 1</a>;</p>†<p>result of joint test.