β‐elemene inhibited expression of <scp>DNA</scp> methyltransferase 1 through activation of <scp>ERK</scp>1/2 and <scp>AMPK</scp>α signalling pathways in human lung cancer cells: the role of Sp1Shunyu Zhao, Swei Sunny Hann|Journal of Cellular and Molecular Medicine|2015Cited by 99