1. Department of Otorhinolaryngology-Head and Neck Surgery, School of Medical Sciences, Universiti Sains Malaysia Health Campus, Kota Bharu, Malaysia
2. Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medicine, Universiti Teknologi Mara, Selangor, Malaysia
3. Department of Pathology, School of Medical Sciences, Universiti Sains Malaysia Health Campus, Kota Bharu, Malaysia