Polypodium leucotomos induces protection of UV-induced apoptosis in human skin cells - de la Fuente, H; Tejedor, R; Garcia-Lopez, A; Mittelbrunn, M; Alonso-Lebrero, JL; Sanchez-Madrid, F; Garcia-Diez, A; Pivel, JP; Penas, PF; Gonzalez, S (JOURNAL OF INVESTIGATIVE DERMATOLOGY, 2005)