(1) Prof. Ramzi Ahmed Abdullah Mothana ,Pharmacognosy department – College of Pharmacy
King Saud University,Riyadh 11451 – KSA,Tel. + 966-1-4677256 Fax. + 966-1-4677245
(2) Prof. Hassan Subki Khalid Department of Pharmacognosy,faculty of Pharmacy
University of Khartoum, e.mail hskhalid2014@gmail.com