QATAR UNIVERSITY COLLEGE OF HEALTH SCIENCES THE CONTRIBUTION OF TOLL-LIKE RECEPTORS IN THE PATHOGENESIS OF DIABETIC RETINOPATHY IN HUMAN MICROVASCULAR RETINAL ENDOTHELIAL CELLS IN VITRO BY FADHEELA DAD BAKHSH MOHAMMED A Thesis submitted to the Faculty of College of Health Sciences in Partial Fulfillment of the Requirements for the Degree of Master of Science in Biomedical Sciences June 2016 © 2016 Fadheela Bakhsh. All Rights Reserved.