1. Pharmacognosy Department, College of Pharmacy, Cairo University, Cairo, Egypt
2. Department of Chemistry, School of Sciences & Engineering, the American University in Cairo, New Cairo, Egypt
3. Pharmacology Department, Faculty of Pharmacy, The British University in Egypt (BUE), Egypt
4. Pharmacognosy Department, College of Pharmacy, Ain Shams University, Cairo, Egypt
5. Department of Biological Sciences, Texas Tech University, Lubbock, Texas, USA