1. School of Dentistry, The University of Manchester; Cochrane Oral Health Group; Coupland III Building, Oxford Rd Manchester UK M13 9PL
2. University of Leeds; Leeds Institute of Health Sciences; Room 2.32, Charles Thackrah Building 101 Clarendon Road Leeds UK LS2 9LJ
3. RED (Research and Education in Dentistry); 10 Longbow Close, Harlescott Lane Shrewsbury UK SY1 3GZ
4. University of Dundee; Dental Health Services & Research Unit; The Mackenzie Building Kirsty Semple Way Dundee Scotland UK DD2 4BF
5. University of Dundee; Unit of Oral Surgery and Medicine; University of Dundee Dental Hospital and School Park Place Dundee Scotland UK DD1 4NR
6. Princess Margaret Hospital; 610 University Avenue Toronto Ontario Canada M5G 2M9
7. University of Glasgow; Glasgow Dental School; 378 Sauchiehall Street Glasgow UK G2 3JZ