1. Department of Endodontics and Operative Dentistry Shanghai Ninth People’s Hospital Shanghai Jiao Tong University School of Medicine College of Stomatology Shanghai Jiao Tong University Shanghai China
2. National Clinical Research Center for Oral Diseases Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology Shanghai Jiao Tong University School of Medicine Shanghai China
3. Department of stomatology The affiliated Jiangyin People’s Hospital of Southeast University Medical College Jiangyin Jiangsu China