[1] Univ Putra Malaysia, Fac Med & Hlth Sci, Dept Med, Serdang 43400, Selangor, Malaysia
[2] Univ Sains Malaysia, Sch Med Sci, Rehabil Med Unit, Kubang Kerian 16150, Kelantan, Malaysia
[3] Univ Sains Malaysia, Sch Med Sci, Dept Neurosci, Kubang Kerian 16150, Kelantan, Malaysia
[4] Univ Sains Malaysia, Sch Dent Sci, Basic Sci Unit, Kubang Kerian 16150, Kelantan, Malaysia
[5] Univ Malaya, Fac Med, Dept Rehabil Med, Kuala Lumpur 59100, Malaysia