1. Natural and Medical Sciences Research Centre, University of Nizwa, P O Box 33, PC 616, Birkat Almouz, Nizwa, Oman
2. Laboratory for Stem Cell & Regenerative Medicine, Natural and Medical Sciences Research Center, University of Nizwa, Nizwa, P. O. Box: 33, PC 616, Oman
3. Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4. Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Ave, Windsor, ON, N9B3P4, Canada