[1] Univ Putra Malaysia, Fac Med & Hlth Sci, Dept Med, Pharmacotherapeut Unit, Serdang 43400, Selangor, Malaysia
[2] Univ Putra Malaysia, Inst Biosci, Lab Nat Prod, Serdang 43400, Selangor, Malaysia
[3] Univ Putra Malaysia, Fac Med & Hlth Sci, Dept Pathol, Histopathol Unit, Serdang 43400, Selangor, Malaysia
[4] Univ Putra Malaysia, Fac Med & Hlth Sci, Dept Med, Neurol Unit, Serdang 43400, Selangor, Malaysia
[5] Univ Bradford, Inst Canc Therapeut, Bradford BD7 1DP, W Yorkshire, England