Effects of Coicis Semen oil on growth of human in situ pancreatic cancer cell line BxPC-3 and expression of VEGF and bFGF Effects of Coicis Semen oil on growth of human in situ pancreatic cancer cell line BxPC-3 and expression of VEGF and bFGF Influence of betulinic acid on proliferation, migration, cell cycle and apoptosis of pancreatic cancer cells