[1] Int Univ Africa, Fac Pharm, Dept Pharmaceut Microbiol, POB 2469, Khartoum, Sudan
[2] Int Univ Africa, Fac Pharm, Dept Pharm Practice & Clin Pharm, POB 2469, Khartoum, Sudan
[3] Univ Khartoum, Fac Pharm, Dept Pharmacol, POB 1996, Khartoum, Sudan
[4] Al Yarmouk Coll, Dept Pharmaceut Microbiol, Pharm Program, POB 11111, Khartoum, Sudan
[5] Univ Khartoum, Fac Pharm, Dept Pharmacognosy, POB 1996, Khartoum, Sudan
[6] King Saud Univ, Coll Pharm, Dept Pharmacognosy, Riyadh 11451, Saudi Arabia
[7] Florida A&M Univ, Coll Sci & Technol, Dept Biol, Tallahassee, FL 32307 USA