Fisetin-induced apoptosis of human oral cancer SCC-4 cells through reactive oxygen species production, endoplasmic reticulum stress, caspase-, and mitochondria-dependent signaling pathways. - Su CH; Kuo CL; Lu KW; Yu FS; Ma YS; Yang JL; Chu YL; Chueh FS; Liu KC; Chung JG (Environmental toxicology, 2017)