MATERIALS: Human osteosarcoma cell line (OS-9901) was graciously provided by Professor Fan, Institute of Osteoscarcoma, Tangdu Hospital of Fourth Medical University of Chinese PLA.

• 材料：人骨肉瘤细胞系OS-9901由解放军第四军医大学唐都医院全军骨肿瘤研究所范清宇教授惠赠。