1. Department of Stomatology of Shanghai Xuhui Central Hospital; Shanghai China
2. Department of Prosthodontics of Yangpu Dental Clinic; Shanghai China
3. Department of Stomatology of the Fifth People's Hospital; Shanghai China
4. Department of Stomatology of Shanghai Huadong Hospital affiliated to Fudan University; Shanghai China
5. Department of Stomatology, Special Consultation Clinic, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology; Shanghai China