1. Institut Universitaire de la Face et du Cou, Centre Antoine Lacassagne, 33 Avenue de Valombrose, 06189 Nice, France
2. Department of Statistics, Centre Antoine Lacassagne, 33 Avenue de Valombrose, 06189 Nice, France
3. Department of Radiation Oncology, Centre Antoine Lacassagne, 33 Avenue de Valombrose, 06189 Nice, France
4. Department of Medical Oncology, Centre Antoine Lacassagne, 33 Avenue de Valombrose, 06189 Nice, France
5. Department of Pathology, Centre Antoine Lacassagne, 33 Avenue de Valombrose, 06189 Nice, France
6. Faculty of medicine, Côte d’Azur University, 06107 Nice, France