1. Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Shanghai Stomatological Hospital, Fudan University, Shanghai, P. R. China
2. Department of Prosthodontics, Shanghai Stomatological Hospital, Fudan University, Shanghai, P. R. China
3. Department of Stomatology, Huashan Hospital, Fudan University, Shanghai, P. R. China
4. Department of Endodontics, Shanghai Stomatological Hospital, Fudan University, Shanghai, P. R. China