Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The patients with locoregional recurrence within 5 years were included in this study. Late distant metastasis-free survival in this study was defined as the period from 5 years after primary surgery until the first distant metastasis occurred. HR indicates hazard ratio.
