1. Department of Periodontology; Peking University School and Hospital of Stomatology; Beijing China
2. Department of Oral Implantology; Guanghua School of Stomatology; Hospital of Stomatology; Sun Yat-sen University; Guangzhou China
3. Guangdong Provincial Key Laboratory of Stomatology; Guangzhou China
4. Department of Biomaterials and Biomimetics; New York University College of Dentistry; New York NY USA
5. School of Chemical Engineering; Oklahoma State University; Stillwater OK USA
6. Department of Periodontology and Implant Dentistry; New York University College of Dentistry; New York NY USA