1. Sir John Walsh Research Institute, School of Dentistry, University of Otago, Dunedin, New Zealand
2. Dental Technology, Faculty of Engineering and Computer Science, University of Applied Sciences, Osnabrueck, Germany
3. School of Dentistry, University of Western Australia, Crawley, Australia
4. University of Sydney Dental School, C24 – Westmead Hospital, University of Sydney, Sydney, Australia