1. Department of Pharmacology and Clinical Pharmacy; College of Medicine and Health Sciences, Sultan Qaboos University; P. O. Box 35 Al Khod Postal Code 123 Oman
2. Department of Pathology; College of Medicine and Health Sciences, Sultan Qaboos University; P. O. Box 35 Al Khod Postal code 123 Oman
3. Department of Physiology; College of Medicine and Health Sciences, United Arab Emirates University; Postal code 1777 Al-Ain United Arab Emirates