1. Natural Products Research Division, Department of Biological and Biomedical Sciences; The Aga Khan University Medical College; Stadium Road Karachi 74800 Pakistan
2. Pakistan Council for Science and Technology, G-5/2; Islamabad Pakistan
3. Department of Pharmacy, College of Health Sciences; Mekelle University; P.O. Box 231 Mekelle 1871 Ethiopia
4. Department of Pharmacology, Institute of Basic Medical Sciences; Khyber Medical University; PDA Building, Block IV, Phase 5, Hayatabad Peshawar Khyber Pakhtunkhwa Pakistan
5. Department of Clinical Pharmacy, College of Pharmacy; King Saud University; P.O. Box 266 Riyadh Saudi Arabia