Betulin elicits anti-cancer effects in tumour primary cultures and cell lines in vitro - Rzeski, W; Stepulak, A; Szymański, M; Juszczak, M; Grabarska, A; Sifringer, M; Kaczor, J; Kandefer-Szerszeń, M (Basic Clin Pharmacol Toxicol, 2009)