Decreased Exosomal Acetylcholinesterase Activity in the Plasma of Patients With Parkinson's Disease. Alzforum, 18 Jun 2021 Shim KH, Go HG, Bae H, Jeong DE, Kim D, Youn YC, Kim S, An SS, Kang MJ. Decreased Exosomal Acetylcholinesterase Activity in the…