1 Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, Program in Head and Neck Cancer and Oral Oncology Program, Neag Comprehensive Cancer Center, UConn Health, Farmington, USA.
2 Department of Clinical Oncology, Leiden University Medical Center, Leiden and IMPAQTT, Wormer, The Netherlands.
3 Centre de Haute Energie (CHE), Nice, France.
4 Department of Oncology, Odense University Hospital, University of Southern Denmark, Odense, Denmark.