[1] Obafemi Awolowo Univ, Dept Pharmacol, Ife, Nigeria
[2] Obafemi Awolowo Univ, Dept Drug Res, Ife, Nigeria
[3] Obafemi Awolowo Univ, Prod Unit, Ife, Nigeria
[4] Obafemi Awolowo Univ, Dept Pharmacognosy, Fac Pharm, Ife, Nigeria
[5] Univ Ibadan, Inst Med Res & Training, Coll Med, Ibadan, Nigeria
[6] Univ Pretoria, Dept Paraclin Sci, Phytomed Program, Fac Vet Sci, ZA-0110 Onderstepoort, South Africa