1. Department of Prosthodontics & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
2. Department of General Dentistry, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology & Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health & NMPA Key Laboratory for Dental Materials, Peking University School and Hospital of Stomatology, Beijing...
3. Department of Stomatology, National Center of Gerontology, National Health Commission, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing Hospital, Beijing 100730, P. R. China
4. Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, P. R. China