1. Department of Internal Medicine, Neurology Section, Arab Medical Center and Khalidi Hospital, Amman, Jordan
2. Division of Neurology, Amiri Hospital, Kuwait and Division of Neurology, Dasman Diabetes Institute, Kuwait City, Kuwait
3. King Abdullah International Medical Research Center, King Saud Ben Abdulaziz University for Health Sciences, NGHA, Riyadh, Saudi Arabia
4. KFMC, Ministry of Health, Riyadh, Saudi Arabia
5. Neurology Section, King Khalid University Hospital, King Saud University and Dallah Hospital, Riyadh, Saudi Arabia
6. Clinical Neurosciences Department, Salmaniya Medical Complex, Manama, Bahrain
7. Department of Neurosciences, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
8. Neurology Division, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
9. Department of Neurology (Medicine), Hamad Medical Corporation, Doha, Qatar
10. Neurology Department, Rashid Hospital and Dubai Medical College, Dubai Health Authority, Dubai, United Arab Emirates
11. Department of Neurology, Neuroimmunology Unit, Hacettepe University Hospitals, Ankara, Turkey
12. MS Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
13. Merck Serono Intercontinental Region, Dubai, United Arab Emirates
14. Multiple Sclerosis Center, American University of Beirut Medical Center, Beirut, Lebanon
15. Neuropsychiatric Department, Faculty of Medicine, Ain Shams University, Egypt