1. Al-Azhar University, Cairo, Egypt
2. Alexandria University, Alexandria Faculty of Medicine, Alexandria, Egypt
3. Aleppo University, Faculty of Medicine, Aleppo, Syria
4. Essex Partnership University NHS Foundation Trust, Wickford, UK
5. Rochester Regional Health/Unity Hospital, Rochester, USA
6. Resident of Neurology, Alharam Hospital, Giza, Egypt
7. University of Florida College of Medicine Jacksonville, Jacksonville, USA
8. Faculty of Medicine, Zagazig University, Zagazig, Egypt
9. Pharmacist Ministry of Health, Cairo, Egypt
10. Emergency Department, Pilgrim Hospital, United Lincolnshire NHS Trust, Boston, UK
11. Gastroenterology Department, Pilgrim Hospital, United Lincolnshire NHS Trust, Boston, UK.