Acknowledgements
The authors would like to express their sincere appreciation and gratitude for the participation of our research subjects, and to the entire NAPS consortium. Financial support from NIH grants R34 AG056639, U19 AG071754, P50 AG016574, P30 AG62677; VA RRD 1K2 RX002947; and Canadian support via Research Chair in Cognitive Decline in Pathological Aging.