1. Department of Otorhinolaryngology-Head Neck Surgery, School of Medical Sciences Universiti Sains Malaysia Health Campus, Malaysia
2. Department of Otorhinolaryngology, Hospital Raja Perempuan Zainab II, Kelantan, Malaysia
3. Department of Hematology and Transfusion Medicine Unit, School of Medical Sciences Universiti Sains Malaysia Health Campus, Malaysia
4. Hospital Universiti Sains Malaysia, Health Campus, Kota Bharu, Kelantan, Malaysia
5. Department of Pathology, School of Medical Sciences Universiti Sains Malaysia Health Campus, Malaysia