Bel7402 proliferation was measured by CCK-8 Assay. Cells were
seeded at a concentration of 5 × 103 cells/well in a 96-well plate and
grown in RPMI1640 medium containing 10% FBS. At indicated time
points, cellswere incubatedwith 10 μl CCK-8 for 3 h at 37 °C.