[1] The University of British Columbia (UBC),Division of Endodontics, Faculty of Dentistry
[2] Sun Yat-Sen University Guangzhou,Department of Conservative Dentistry & Endodontics, Guanghua School of Stomatology, Guangdong Province Key Laboratory of Stomatology
[3] UBC,Department of Materials Engineering
[4] Harbin Engineering University,Center for Biomedical Materials and Engineering, College of Material Science and Chemical Engineering