APOE and Alzheimer disease: Cross-sectional analyses from the Cretan Aging Cohort (CAC) revealed significant associations between objective long sleep duration and executive deficits among persons diagnosed with MCI and cognitively non-impaired individuals [11], whereas long sleep duration in MCI and Alzheimer’s Disease (AD) patients may be driven by the presence of APOE (Apolipoprotein E) ε4 allele [14].