P4‐284: PRELIMINARY VALIDATION OF THE NORTH‐EAST VISUAL HALLUCINATION SCALE SEVERITY SCORE IN LEWY BODY DISEASES. (1st July 2006) - Urwyler, Prabitha; Murphy, Nicholas; Firbank, Michael J.; Killen, Alison; Nef, Tobias; Müri, René; Mosimann, Urs Peter; McKeith, Ian; Collerton, Daniel; Taylor, John-Paul