[1] Inst Med Res & Med Plants Studies, Ctr Res Med Plants & Tradit Med, Yaounde, Cameroon
[2] Univ Dschang, Fac Sci, Dept Biochem, Res Unit Microbiol & Antimicrobial Subst, Dschang, Cameroon
[3] Univ Milan, Dept Pharmacol & Biomol Sci, Milan, Italy
[4] Univ Wolverhampton, Res Inst Healthcare Sci, Fac Sci & Engn, Wolverhampton, England