1. Department of Neurology; National Hospital of Niamey; Niamey Niger
2. Department of Neurology; Hassan II University Teaching Hospital; Fez Morocco
3. Laboratory of Epidemiology, Clinical Research; and Health Community; Faculty of Medicine and Pharmacy; Sidi Mohammed Ben Abdallah University; Fez Morocco
4. Clinical Neuroscience Laboratory, Faculty of Medicine and Pharmacy; Sidi Mohamed Ben Abdellah University; Fez Morocco
5. Sleep Medicine Center; Hassan II University Teaching Hospital; Fez Morocco