%0 Journal Article %T L-amphetamine improves memory in MS patients with objective memory impairment: %A Sumowski, James F %A Chiaravalloti, Nancy %A Erlanger, David %A Kaushik, Tanya %A Benedict, Ralph HB %A DeLuca, John %J Multiple Sclerosis Journal %V 17 %N 9 %P 1141-1145 %@ 1352-4585 %D 2011-05-11 %I SAGE PublicationsSage UK: London, England %~ DeepDyve