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.
Kaplan–Meier curve of PFS (A) and OS (B) for patients with epidermal growth factor receptor exon 21 L858R mutation.
Notes: Group A2, 28 patients received icotinib+chemotherapy; Group B2, 33 patients received icotinib alone; Group C2, 28 patients received chemotherapy alone.
Abbreviations: OS, overall survival; PFS, progression-free survival.
