1. Center for Plastic & Reconstructive Surgery, Department of Stomatology Zhejiang Provincial People's Hospital (Affiliated People's Hospital, Hangzhou Medical College) Hangzhou Zhejiang China
2. Department of Stomatology Bengbu Medical College Bengbu Anhui China
3. Department of Restorative Dentistry, Division of Oral Health Science, Graduate School of Dental Medicine Hokkaido University Sapporo Japan