1. Independent researcher, Suzhou Science and Technology Town, Huqiu, Suzhou, Jiangsu, China
2. Clinical lecturer/StR in Restorative Dentistry, Cardiff University School of Dentistry and University Hospital of Wales, Cardiff and Vale University Health Board
3. Chair in Cariology and Operative Dentistry, Honorary Consultant in Restorative Dentistry, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London