1. West China Hospital of Stomatology, Sichuan University; Department of Oral and Maxillofacial Surgery, State Key Laboratory of Oral Diseases; NO.14, 3rd Section of Ren Min Nan Road Chengdu Sichuan China 610041
2. State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University; Department of Head and Neck Oncology; No. 14, Section Three, Ren Min Nan Road Chengdu Sichuan China 610041
3. West China Hospital of Stomatology, Sichuan University; Department of Oral Anaesthesiology and Intensive Care Unit; No 14, Section 3, South Renmin Road Chengdu Sichuan China 610041
4. The University of Queensland; School of Nursing and Midwifery; Mater Campus: JP Kelly Building South Brisbane Queensland Australia 4101
5. UCL Eastman Dental Institute; Unit of Periodontology and International Centre for Evidence-Based Oral Health; 256 Gray's Inn Road London UK WC1X 8LD
6. The University of Manchester; Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health; JR Moore Building Oxford Road Manchester UK M13 9PL