P1‐295: DIFFERENTIATING ALZHEIMER'S DISEASE (AD), VASCULAR DEMENTIA (VAD), MILD COGNITIVE IMPAIRMENT (MCI) AND PARKINSON'S DISEASE (PD): A META‐ANALYSIS OF NEUROTRANSMITTERS, METABOLIC, VASCULAR AND INFLAMMATORY BIOMARKERS. (1st July 2006) - Putilina, Maria; Villa, Andrea; Dave, Devangi M.; Friederich, Jan; Trotz, Margit; Murray, Ian V.J.