1. Oral Medicine, Oral Surgery and Implantology Unit University of Santiago de Compostela Santiago de Compostela Spain
2. Department of Nursing I University of the Basque Country (UPV/EHU) Leioa Bizkaia Spain
3. Biocruces Bizkaia Health Research Institute Barakaldo Bizkaia Spain
4. Osakidetza, Hospital Universitario Cruces Barakaldo Bizkaia Spain
5. School of Medicine and Dentistry University of Santiago de Compostela Santiago de Compostela Spain