Cytotoxic and apoptogenic effect of tea (Camellia sinensis var. assamica) root extract (TRE) and two of its steroidal saponins TS1 and TS2 on human leukemic cell lines K562 and U937 and on cells of CML and ALL patients. - Ghosh,P.; Besra,S.E.; Tripathi,G.; Mitra,S.; Vedasiromoni,J.R. (Leuk Res, 2006)