1. Department of Pharmacology, Faculty of Pharmacy, Alneelain University, Khartoum, Sudan
2. Department of Pharmacology, Faculty of Pharmacy, Omdurman Islamic University, Khartoum, Sudan
3. Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
4. Division of Pharmacy Practice and Policy, School of Pharmacy, University of Nottingham, Nottingham, United Kingdom
5. Department of Optometry, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
6. Department of Pharmacology, Faculty of Pharmacy, University of Khartoum, Khartoum, Sudan