1. Department of Family and Community Medicine, Faculty of Medicine, The University of Jordan, Amman 11942, Jordan
2. Department of Pharmacology, Public Health and Clinical Skills, Faculty of Medicine, The Hashemite University, P.O. Box 330127, Zarqa 13133, Jordan
3. Department of Neuroscience, Caring Science and Society, Karolinska Institutet, 141 52 Huddinge, Sweden
4. Department of Neurology, University of Kansas Medical Center, Kansas City, KS 66160, USA
5. Office of Scientific Affairs and Research, King Hussein Cancer Center, Amman 11941, Jordan