P2‐221: CEREBROSPINAL FLUID AMYLOID‐β 42, TOTAL TAU AND PHOSPHORYLATED TAU ARE DISTINCT IN PATIENTS WITH NORMAL PRESSURE HYDROCEPHALUS AND ALZHEIMER'S DISEASE. (1st July 2019) - Mao, Chenhui; Liu, Caiyan; Li, Jie; Sha, Longze; Lei, Dan; Huang, Xinying; Dong, Liling; Xu, Qi; Peng, Bin; Cui, Liying; Gao, Jing