1. Audiology Programme, School of Health Sciences, Universiti Sains Malaysia, Kelantan, Malaysia.
2. Audiology Programme, School of Rehabilitation Sciences, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Wilayah Persekutuan, Malaysia.
3. Department of Psychiatry, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Center, Wilayah Persekutuan, Malaysia.
4. Department of Otorhinolaryngology, School of Medicine, Universiti Sains Malaysia, Kelantan, Malaysia.