APOE and Alzheimer disease: We imaged sub-regions of the hippocampus (CA1, CA4, DG) from an AD donor (82-year-old male with AD dementia, Braak score of V, MMSE score of 19, APOE ε3/ε3, and a post-mortem interval of 2.95 hours) which included part of the subiculum, CA1, CA4, and DG subfields (Figure S6A).