1. Adelaide Dental School, The University of Adelaide; Australian Research Centre for Population Oral Health; Adelaide Australia 5005
2. The University of Adelaide; Adelaide Dental School; 233 North Terrace Adelaide Australia SA 5005
3. 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
4. Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester; Cochrane Oral Health; JR Moore Building Oxford Road Manchester UK M13 9PL
5. University of Dundee; Division of Oral Health Sciences; Dental Hospital & School Park Place Dundee Scotland UK DD1 4HR
6. Bauru School of Dentistry, University of São Paulo; Department of Dentistry, Endodontics and Dental Materials; Al. Octávio Pinheiro Brisolla, 9-75 Bauru Brazil 17012-901 Bauru-SP