Table 1.

Data types integrated in the present study

Default activity, H20-PET	Updated meta-analysis of nine published PET studies [data from Shulman et al. (1997b)]
Amyloid deposition, PIB-PET	New data
Structural atrophy, MRI	New data
Glucose metabolism, FDG-PET	Multicenter data from Herholz et al. (2002)
Retrieval success effect, fMRI	Meta-analysis of data