Ptaquiloside from bracken (Pteridium spp.) inhibits tumour-infiltrating CD8+T cells in HPV-16 transgenic mice - Santos, C.; Ferreirinha, P.; Sousa, H.; Ribeiro, J.; Bastos, M.M.S.M.; Neto, T.; Oliveira, P.A.; Medeiros, R.; Vilanova, M.; Gil da Costa, R.M. (Food and Chemical Toxicology, 2016)