1. Department of Oral Medicine and Radiology, Sri Ramachandra Institute of Higher Education and Research (DU), Porur, Chennai 600116, India
2. Centre for Oral Cancer Prevention and Research, Sree Balaji Dental College and Hospital, Pallikaranai, Chennai 600100, India
3. Department of Preventive Oncology (Research), Cancer Institute (WIA), Adyar, Chennai 600020, India
4. Department of Surgical Oncology, Cancer Institute (WIA), Adyar, Chennai 600020, India
5. Department of Oral Pathology, Sri Ramachandra Institute of Higher Education and Research (DU), Porur, Chennai 600116, India