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Multiple sclerosis was at one time viewed as a spiritual (God-given) disorder; only much later was it recognized as a scarring process. With advancing scientific knowledge, it was seen as a primarily demyelinating disease, later as thromboembolic in origin, and finally as inflammatory and destructive, probably an immunologic response to exogenous (infectious) agents or to one or more autoantigens...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.