Synergistic effects of isomorellin and forbesione with doxorubicin on apoptosis induction in human cholangiocarcinoma cell lines - Hahnvajanawong, C; Wattanawongdon, W; Chomvarin, C; Anantachoke, N; Kanthawong, S; Sripa, B; Reutrakul, V (Cancer Cell Int, 2014)