1. Department of Chemistry, College of Science, Al-Nahrain University, Baghdad, Iraq
2. Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
3. School of Chemical Sciences & Food Technology, Faculty of Science and Technology, Universiti Kebangsaan, Malaysia, 43600 Bangi, Selangor, Malaysia