1. Department of Periodontology; Institute of Odontology; The Sahlgrenska Academy at University of Gothenburg; Göteborg Sweden
2. Department of Industrial Engineering; University of Trento; Trento Italy
3. Section of Electron Microscopy; Azienda Provinciale per I Servizi Sanitari di Trento; Trento Italy
4. Healthcare Research and Innovation Program (IRCS); Bruno Kessler Foundation; Trento Italy