Gandy obviously meant in humans. However, in order to be balanced he should have added that we don't know the precise role of non-plaque A-beta peptides such as soluble oligomers in humans either. The paradigm shift away from full-fledged fibrils to oligomeric ("soluble") assemblies being the primary neurotoxic form is backed by several lines of evidence (papers are since 2001, I think) but all in cells and mice.
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