de Oliveira, J.M.P.F., Pacheco, A.R., Coutinho, L., Oliveira, H., Pinho, S., Almeida, L., Fernandes, E., Santos, C., 2018. Combination of etoposide and fisetin results in anti-cancer efficiency against osteosarcoma cell models. Arch Toxicol, 92(3), 1205-1214.