1. Department of ENT, Sri Lakshmi Narayana Institute of Medical Sciences, Pondicherry, Puducherry, India
2. Department of ENT, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
3. Department of ENT, Jawaharlal Institute of Post-Graduate Medical Education, Pondicherry, Puducherry, India
4. Department of ENT, Mahatma Gandhi Medical College and Research Institute, Pondicherry, Puducherry, India