title: Wei Zhang, Bao-an Chen, Jun-fei Jin, You-ji He, and Yi-qi Niu, Involvement of c-Jun N-terminal kinase in reversal of multidrug resistance of human leukemia cells in hypoxia by 5-bromotetrandrine. November 2013;54(11):2506-2516. http://dx.doi.org/10.3109/10428194.2013.776681.