1. Medical Ofcer (Supy), Swasthya Bhawan, , Kolkata, West Bengal.
2. Senior Resident, R. G. Kar Medical College And Hospital. Kolkata.
3. Professor And Head Department Of Otorhinolaryngology, R. G. Kar Medical College & Hospital, Kolkata.
4. Young Scientist (DST), Institute Of Post-graduate Medical Education And Research, A.J.C. Bose Road, Kolkata-700020, West Bengal, India.