1. Charité - Universitätsmedizin Berlin; Department of Operative and Preventive Dentistry; Campus Benjamin Franklin Aßmannshauser Str 4-6 Berlin Germany 14197
2. 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
3. School of Dentistry, University of Michigan; Department of Cariology, Restorative Sciences and Endodontics; 1011 N. University 2393 Ann Arbor Michigan USA MI 48109-1078
4. University of Copenhagen; Department of Cariology and Endodontics; Nørre Allé 20 Copenhagen Denmark DK-2200
5. University of Dundee; Division of Oral Health Sciences; Dental Hospital & School Park Place Dundee Scotland UK DD1 4HR
6. Dundee Dental School, University of Dundee; Park Place Dundee Tayside UK DD1 4HN
7. Dundee Dental School, University of Dundee; Division of Restorative Dentistry; Dundee UK
8. University of Greifswald; Greifswald Germany