1. China Coal Research Institute, Coal Mining Branch, Beijing 400037, P. R. China
2. CCTEG Coal Mining Research Institute, Beijing 100013, P. R. China
3. State Key Laboratory of Coal Mining and Clean Utilization, Beijing 100013, P. R. China
4. College of Medical Engineering & The Key Laboratory for Medical Functional Nanomaterials, Jining Medical University, Jining 272111, P. R. China
5. Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200031, P. R. China
6. Fudan Zhangjiang Institute, Fudan University, Shanghai 200437, P. R. China
7. School of Pharmaceutical Sciences, Peking University, Beijing 100191, P. R. China