¹Department of Otorhinolaryngology, Head and Neck Surgery, Hospital Selayang, Batu Caves, Selangor, Malaysia; Department of Otorhinolaryngology, Head and Neck Surgery, University Kebangsaan Malaysia Medical Centre, Batu Caves, Selangor, Malaysia
²Department of Otorhinolaryngology, Head and Neck Surgery, Hospital Selayang, Batu Caves, Malaysia
³Department of Otorhinolaryngology, Head and Neck Surgery, Hospital Selayang, Selangor, Batu Caves, Malaysia