<qa>  What is the original tool validated?The original tool validated will complete the palette of those that the investigators are developing to evaluate the quality of care of MS patients according to different dedicated organizations formal networks or not, focused on the patients or professionals. All tools will initially be tested together, in the framework of the IRSEP project funding by the ministry of health : PREQHOS n 2010-A0096138 on 3 regional population-based cohorts. 