1. School of Dentistry and Oral Health, Centre for Medicine and Oral Health; Griffith University, Gold Coast Campus; Gold Coast QLD Australia
2. Department of Prosthodontics, School of Dentistry; National and Kapodistrian University of Athens; Greece
3. Department of Operative Dentistry and Periodontology, University School and Hospital; Albert Ludwigs University Freiburg, Freiburg i. Br.; Germany