1. Department of Otolaryngology, Head and Neck Surgery, Dr. Ziauddin University & Hospital, Karachi, Pakistan
2. Department of Otolaryngology, Head and Neck Surgery, Fellow Head & Neck Surgical Oncology and Microvascular Reconstructive Surgery, Beth Israel Deaconess Medical Centre, Boston, USA
3. Department of Surgery, Aga Khan University & Hospital, Karachi, Pakistan
4. Department of Surgery, Cancer Foundation Hospital, Karachi, Pakistan