1 MD (USM), M.Med (ORL-HNS] Department of otorhinolaryngology-Head & Neck Surgery, School of Medical Sciences, Universiti Sains Malaysia Health Campus, 16150 Kota Bharu, Kelantan, Malaysia. Email: irfankb@usm.my.
2 MBChB (Leicester), M.Med (Internal Medicine), Department of Medicine, School of Medical Sciences, Universiti Sains Malaysia 16150 Kota Bharu Kelantan, Malaysia. Universiti Sains Malaysia Health campus, 16150 Kota Bharu, Kelantan, Malaysia.
3 MD (USM), Klinik Nik Azam, Jalan JKR, 17000 Pasir Mas, Kelantan, Malaysia.