???? ???? ??? ??? ?? ??? ??? ???? ????,????,???? ?? ?? ??? ?? ?? ???? ??? ?? ? ?? ? ??? ??????. ?? ??? ????? ?????. ????? ? ?? ???? ??? ??? ???? ????? ??? ????? ???? ?????? ???? ?? ?? ????? ???? ? ?? ??? ?????????. ?????. A common neurological feature of this ailment is impaired myelin gen