American Academy of Neurology (AAN), Neurology, 7(73), p. 572-573, 2009
DOI: 10.1212/wnl.0b013e3181ab6d17
American Academy of Neurology (AAN), Neurology, 17(71), p. 1313-1318, 2008
DOI: 10.1212/01.wnl.0000327667.48013.9f
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