P1‐023: CEREBROSPINAL FLUID AND PLASMA NEUROFILAMENT LIGHT ELEVATIONS CORRESPOND TO WORSE COGNITIVE PERFORMANCE IN AGING ADULTS. (1st July 2019) - Osborn, Katie E.; Liu, Dandan; Bown, Corey W.; Khan, Omair A.; Moore, Elizabeth E.; Gifford, Katherine A.; Acosta, Lealani A.; Bell, Susan P.; Hohman, Timothy J.; Blennow, Kaj; Zetterberg, Henrik; Jefferson, Angela L.