1. Department of Geriatric Dentistry, Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing100081, China
2. Biomedical Engineering Department, Peking University, Beijing100191, China
3. Peking University International Cancer Institute, Beijing100191, China
4. Peking University-Yunnan Baiyao International Medical Research Center, Beijing100191, China
5. Institute of Medical Technology, Health Science Center of Peking University, Beijing100191, China