1. The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China.
2. Department of Biomaterials, Radboud University Medical Center, Nijmegen, The Netherlands.
3. National Dental Centre Singapore, Singapore, Singapore.
4. Duke-NUS Medical School, Singapore, Singapore.