I'll have to read it again but I didn't notice where they ruled out environmental factors (read: epigenetics). The thing about families is they share environments, diet, habits, other norms, etc.
This isn't really anything new, the paper is just proposing APOE4 homozygous Alzheimer's as a special category.
I'll have to read it again but I didn't notice where they ruled out environmental factors (read: epigenetics). The thing about families is they share environments, diet, habits, other norms, etc.