1. Department of Otorhinolaryngology, Head and Neck Surgery, Hospital Selayang, Lebuh Raya Selayang – Kepong, 68100 Batu Caves, Selangor, Malaysia
2. Department of Otorhinolaryngology, Head and Neck Surgery, Universiti Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latif, Bandar Tun Razak, 56000, Kuala Lumpur , Wilayah Persekutuan, Malaysia