Affiliation: | 1. Department of Reconstructive Dentistry, University Center for Dental Medicine Basel, University of Basel, Basel, Switzerland;2. Department of Prosthodontics and Dental Materials, School of Dental Medicine, University of Siena, Siena, Italy;3. Department of Restorative Dentistry, School of Dental Medicine, University of Leeds, Leeds, UK;4. Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Bern, Switzerland |