Figure 2. Validation of candidate circRNA in training set. (A) Total 20 paired plasma from LSCC patients, and 20 cancer-free controls were used in RT-qPCR analysis. (B) The detailed expression of circ_0019201, circ_0011773 and circ_0122790 in LSCC and control groups. Data was presented as mean ± SEM. Data was analyzed with student t test. n.s. indicated no significant, * indicated p < 0.05 and ** indicated p < 0.01.