Department of Neurology;
Hassan II University Teaching Hospital;
Fez;
Morocco;
Laboratory of Epidemiology;
Clinical Research;
and Health Community;
Faculty of Medicine and Pharmacy;
Sidi Mohammed Ben Abdellah University;
Fez;
Morocco;
Department of Pharmacology;
Hassan II University Teaching Hospital;
Fez;
Morocco;
B-LYMPHOCYTE; CD20; Multiple Sclerosis; RITUXIMAB; Moroccan Population;