1. The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine of Ministry of Education (KLOBM), School & Hospital of Stomatology, Wuhan University , Wuhan, China
2. Department of Endodontics, School and Hospital of Stomatology, Wuhan University , Wuhan, China
3. Department of Oral Radiology, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam , Amsterdam, The Netherlands