1. Department of Operative Dentistry & Endodontics, School of Stomatology, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology Fourth Military Medical University Xi'an China
2. School of Dentistry, College of Biomedical and Life Sciences Cardiff University Cardiff UK
3. Department of Pediatric Dentistry, School of Stomatology, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases Fourth Military Medical University Xi'an China
4. Department of Occupational and Environmental Health and the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health Fourth Military Medical University Xi'an China