1. The Lancashire Specialist Dental Practice; Weind House, Park Hill Road Garstang Preston UK PR3 1EY
2. School of Dentistry, The University of Manchester; Cochrane Oral Health Group; JR Moore Building Oxford Road Manchester UK M13 9PL
3. Glasgow Dental Hospital and School; Restorative Dentistry; 378 Sauchiehall Street Glasgow UK G2 3JZ