Affiliation: | 1. Department of Endodontics, Comprehensive Dental Care, Faculty of Dentistry, The University of Hong Kong, , Hong Kong SAR, China;2. Department of Oral Biosciences, Faculty of Dentistry, The University of Hong Kong, , Hong Kong SAR, China;3. Department of Periodontology and Public Health, Faculty of Dentistry, The University of Hong Kong, , Hong Kong SAR, China |