1. Department of Surgery, Steve Biko Academic Hospital, University of Pretoria, Hatfield 0028, South Africa
2. Department of Oral Medicine and Radiology, Sri Ramachandra Institute of Higher Education and Research, Chennai 600116, India
3. SAMRC Precision Oncology Research Unit (PORU), DSI/NRF SARChI Chair in Precision Oncology and Cancer Prevention (POCP), Pan African Cancer Research Institute (PACRI), University of Pretoria, Hatfield 0028, South Africa