1. Department of Restorative Dentistry and Endodontology, Ghent Dental Laser Centre, Ghent Dental Photonics Research Clustre, Dental School, Ghent University, Ghent University Hospital, De Pintelaan 185-P8, 9000 Ghent, Belgium
2. Department of Clinical Neurosciences, John van Geest Centre for Brain Repair and Wellcome Trust-Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge Biosciences Campus, Clifford Allbutt Building, Cambridge CB2 0QH, UK
3. SOLA Academy, Bernhard Gottlieb University Clinic of Dentistry, Sensengaße 2A, 1090 Vienna, Austria
4. The School of Dentistry, University of Queensland, Clinical Building, Room 216, 200 Turbot Street, Brisbane, QLD 4000, Australia