1. Department of Oral Radiology and State Key Laboratory of Oral Diseases; West China College of Stomatology; Sichuan University; Chengdu China
2. Faculty of Dentistry; The University of Hong Kong; Prince Philip Dental Hospital; Sai Ying Pun Hong Kong SAR China
3. School of Science; Faculty of Health and Environmental Sciences; Auckland University of Technology; Auckland New Zealand
4. Zhujiang New Town Dental Clinic; Guanghua School and Hospital of Stomatology; Guangdong Key Laboratory of Stomatology; Sun Yat-sen University; Guangzhou Guangdong China