Sze Yin Ng1, Bee See Goh2. 1. Department of Otorhinolaryngology, Penang General Hospital, 10450 Georgetown, Pulau Pinang; Department of Otorhinolaryngology, Head and Neck Surgery, Universiti Kebangsaan Malaysia Medical Centre, 56000 Cheras, Kuala Lumpur, Malaysia. 2. Department of Otorhinolaryngology, Head and Neck Surgery, Universiti Kebangsaan Malaysia Medical Centre, 56000 Cheras, Kuala Lumpur; Institute of Ear, Hearing and Speech (Institute-HEARS), Universiti Kebangsaan Malaysia, Jalan Temerloh, 56000 Cheras, Kuala Lumpur, Malaysia.