P3‐154: BEHAVIORAL SYMPTOMS ASSOCIATED WITH PROGRESSION FROM MILD COGNITIVE IMPAIRMENT TO ALZHEIMER'S DISEASE: A LONGITUDINAL STUDY. (1st July 2014) - Van der Mussele, Stefan; Fransen, Erik; Mariën, Peter; Saerens, Jos; Somers, Nore; Goeman, Johan; De Deyn, Peter Paul; Engelborghs, Sebastiaan