highly significantP < 0.0001
Patients with ER-negative status (EFS: P = 0.043) had poorer outcomes and RT was associated with highly significant increase in LRRFS, EFS and OS (P < 0.0001, P < 0.001 and P = 0.017). status released display-pdf yes is-olf no is-manuscript no is-preprint no is-journal-matter no is-scanned no is-retracted no Received 2013 Dec 4; Accepted 2013 Dec 31; Collection date 2014.