APOE and Alzheimer disease: One patient with AD (II‐1) and two patients with aMCI (III‐4, III‐5) were APOE ε4 carriers, while the proband (III‐2), one patient with aMCI (III‐3) and two cognitively intact family members (II‐2, III‐8) were non‐carriers of the APOE ε4 allele.