1. Department of Conservative Dentistry ADEMA School of Dentistry ADEMA Health IUNICS group University of the Balearic Islands Palma Spain
2. Department of Conservative Dentistry ADEMA School of Dentistry University of the Balearic Islands Palma Spain
3. Department of dental prostheses, ADEMA School of Dentistry University of the Balearic Islands Palma Spain
4. Advisory Council for Research ADEMA School of Dentistry ADEMA Health IUNICS group University of the Balearic Islands Palma Spain
5. Department of statistics and research, ADEMA School of Dentistry ADEMA Health IUNICS group University of the Balearic Islands Palma Spain
6. Occupational Risk Prevention Service Balearic Islands Health Service Palma Spain
7. Department of Oral Medicine Faculty of Dentistry University of Oslo Oslo Norway