1 Oral Medicine, Oral Surgery and Implantology Unit (MedOralRes), Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.
2 Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
3 Laboratory of Virology, Institute of Tropical Medicine of São Paulo, School of Medicine, University of São Paulo, São Paulo, Brazil.
4 Oral Medicine Unit, Faculty of Dentistry, European University of Madrid, Madrid, Spain.