1 Clinical Research Coordination, National Cancer Institute of Brazil (INCA), Rio de Janeiro, Brazil. Electronic address: daniel.cohen@inca.gov.br.
2 School of Health Sciences, Department of Dentistry, Amazonas State University, Manaus, Brazil.
3 Oral Diagnosis Department, Semiology and Pathology Areas, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Brazil.
4 Clinical Research Coordination, National Cancer Institute of Brazil (INCA), Rio de Janeiro, Brazil.
5 Oral Medicine Postgraduate Program Federal University of Pernambuco (UFPE), Recife, Brazil.
6 University College London (UCL) Eastman Dental Institute, London, UK; University College London (UCL), Eastman Dental Institute, NIHR University College London Hospitals (UCLH), Biomedical Research Centre, London, United Kingdom.
7 University College London (UCL) Eastman Dental Institute, London, UK.