1. Faculty of Medicine and Odontology, Oral Medicine, Oral Surgery and Implantology Unit, University of Santiago de Compostela, Santiago de Compostela, Spain
2. MedOralRes Group, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
3. Department of Endodontics, Faculty of Medicine and Odontology, University of Santiago de Compostela, Santiago de Compostela, Spain
4. Gastroenterology Department, Complexo Hospitalario Universitario de Ourense, Ourense, Spain