Response: Commentary: Chronic PD-1 Checkpoint Blockade Does Not Affect Cognition or Promote Tau Clearance in a Tauopathy Mouse Model - Lin, Yan; Sandusky-Beltran, Leslie A.; Gamallo-Lana, Begona; Mar, Adam; Sigurdsson, Einar M. (Frontiers in Aging Neuroscience, 2020)