Operative versus Nonoperative Treatment in Patients with Advanced Non-Small-Cell Lung Cancer: Recommended for Surgery

Figure 4

Kaplan−Meier plots for overall survival. (a) Stage IVA-N0; (b) stage IVA-N1; (c) stage IVA-N2; (d) stage IVA-N3.

(a)

(b)

(c)

(d)