Effects of component formula of Salviae Miltiorrhizae Radix et Rhizoma and Ginseng Radix et Rhizoma on cell proliferation, apoptosis and skeleton in lung cancer A549 cells Apigenin for inducing apoptosis of lung cancer A549 cell and affecting expressionof Bcl-2 Identification of multidrug resistance gene MDR1 associated microRNA of salvianolic acid A reversal in lung cancer