1. Arif Raza Khan:
Department of ENT and Head and Neck Surgery Khyber Teaching Hospital,Peshawar,Pakistan
2. Ibrar Hussain:
Department of ENT and Head and Neck Surgery Khyber Teaching Hospital,Peshawar, Pakistan
3. M Asad Ullah Arif:
Department of ENT and Head and Neck Surgery Khyber Teaching Hospital,Peshawar, Pakistan