fig4
Figure 4. Overall survival outcomes for different fractionated doses in the EBRT group. (A) ≤ 2 Gy vs. > 2 Gy; (B) ≤ 2 Gy vs. ≥ 2.5 Gy; (C) ≤ 3 Gy vs. > 3 Gy; (D) ≤ 4 Gy vs. > 4 Gy; (E) ≤ 5 Gy vs. > 5 Gy; (D) ≤ 6 Gy vs. > 6 Gy. EBRT: External beam radiation therapy; LNM: lymph node metastasis.
