Hypericum perforatum L. subsp. perforatum induces inhibition of free radicals and enhanced phototoxicity in human melanoma cells under ultraviolet light - Menichini, G; Alfano, C; Marrelli, M; Toniolo, C; Provenzano, E; Statti, G A; Nicoletti, M; Menichini, F; Conforti, F (Cell Prolif, 2013)