Effects of Ursolic Acid Combined with Doxorubicin on the Proliferation of Cervical Cancer HeLa Cells

• Shaning WANG, 
• Zaiqiao LI, 
• Chong WU, 
• Di TIAN, 
• Guizhi YE, 
• Ling SONG, 
• Mingying GUI, 
• Xiao MA