Rate of change for #CSF #tTau and #pTtau varies by #AlzheimerDisease stages and does not correlate with brain atrophy rate of change after symptom onset. Important implications for future clintrials - https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2757369?utm_source=twitter&utm_campaign=content-shareicons&utm_content=article_engagement&utm_medium=social&utm_term=121419#.XfUHpclXX80.twitter