The effects of C . cicadae on MHCC97H cell viability. The cell viability was tested by MTT assay. Data were expressed as mean ± SD (n = 3 separate experiments). **,***, P < 0.01, 0.001 vs. control in 48 h treatment group, and ##, ###, P < 0.01, 0.001 vs. control in 72 h treatment group, respectively.