1. Applied Organic Chemistry Department, National Research Centre, Dokki, Giza, Egypt
2. National Center for Petrochemicals Technology, King Abdulaziz City for Science and Technology, PO Box 6086, Riyadh 11442, Saudi Arabia
3. Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia