1 (Corresponding author) MD, M.Med (ORL-HNS) Department of ORL-HNS School of Medical Sciences, Universiti Sains Malaysia Health Campus, 16150 Kota Bharu, Kelantan, Malaysia. email: irfankb@usm.my.
2 MD, M.Med (ORL-HNS) Department of ORL-HNS School of Medical Sciences, Universiti Sains Malaysia Health Campus, Malaysia.