1. Faculty of Dentistry The University of Hong Kong Hong Kong SAR China
2. Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology Sun Yat‐Sen University Guangzhou China
3. Shanghai Adore Dental Care Shanghai China
4. Department of Oral and Maxillo‐facial Implantology, Shanghai Ninth People's Hospital, School of Medicine Shanghai Jiaotong University Shanghai China
5. University of Berne Berne Switzerland