1. Department of Oral and Maxillofacial Pathology, Guru Nanak Institute of Dental Sciences and Research, Kolkata, West Bengal, India
2. Department of Oral and Maxillofacial Pathology, Dr. R. Ahmed Dental College and Hospital, Kolkata, West Bengal, India
3. Department of Pedodontics and Preventive Dentistry, Centre for Dental Education and Research, All Institute of Medical Sciences, New Delhi, India