Intermittent head drops: the differential spectrum
Elena Antelmi, Giuseppe Plazzi, Roberto Erro, Paolo Tinuper, Bettina Balint, Rocco Liguori, Kailash P Bhatia
Journal of Neurology, Neurosurgery & Psychiatry Apr 2016, 87 (4) 414-419; DOI: 10.1136/jnnp-2015-310864