M. Q. Zeshan, M. Ashraf, M. O. Omer, H. M. Khan, M. A. Ali and A. A. Anjum
Department of Pharmacology and Toxicology,
**Department of Microbiology, University of Veterinary and Animal Sciences, Lahore, 54000, Pakistan;
*Department of Pharmacy, Lahore College for Women University, Jail Road, Lahore, 54000, Pakistan.