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Claassen, Jens; Spiegel, Rainer; Kalla, Roger; Faldon, Mary; Kennard, Christopher; Danchaivijitr, Chotipat; Bardins, Stanislaw; Rettinger, Nicole; Schneider, Erich; Brandt, Thomas; Jahn, Klaus; Teufel, Julian; Strupp, Michael; Bronstein, Adolfo (2013). A randomised double-blind, cross-over trial of 4-aminopyridine for downbeat nystagmus--effects on slowphase eye velocity, postural stability, locomotion and symptoms. Journal of neurology, neurosurgery and psychiatry, 84(12), pp. 1392-1399. BMJ Publishing Group 10.1136/jnnp-2012-304736
