Table 1.

Inclusion criteria for the four groups used in the present study

Study group	Characteristics for inclusion
Normal pathology for age	Braak stage 0
	Thal phase 0–1
	No other significant pathological changes
AD pathological changes	Braak stage III or higher
	Thal phase 3 or higher
	No other significant pathological changes
Possible PART	Braak stage III or lower
	Thal phase 1–2
	No other disease associated with NFTs present
Definite PART	Braak stage III or lower
	Thal phase 0
	No other disease associated with NFTs present