[1] Univ Teknol MARA, Fac Med, Dept Physiol, Sungai Buloh Campus, Selangor, Malaysia
[2] Univ Kebangsaan Malaysia, Fac Med, Dept Med Educ, Kuala Lumpur, Malaysia
[3] Univ Kebangsaan Malaysia, Fac Med, Dept Med Educ, Kuala Lumpur, Malaysia
[4] Univ Kebangsaan Malaysia, Fac Med, Dept Otorhinolaryngol Head & Neck Surg, Kuala Lumpur, Malaysia
[5] Univ Teknol MARA, Fac Med, Dept Med Educ, Sungai Buloh Campus, Shah Alam, Selangor, Malaysia