1. Campaign for Head and Neck Cancer Education (CHANCE) Program , Cephas Health Research Initiative Inc, Ibadan , Nigeria
2. Kebbi State Medical Centre , Kalgo , Nigeria
3. Planning Research and Statistics Unit, Mental and Oral Health Development Organization , Sapele , Nigeria
4. Department of Oral and Maxillofacial Surgery, Jaipur Dental College , Maharaj Vinayak Global University , Jaipur , Rajastan, India
5. Department of Periodontology and Community Dentistry , University of Ibadan , Ibadan , Nigeria
6. Department of Statistics , Federal University of Technology , Akure , Nigeria