Context Studies investigating abnormalities of regional gray matter volume in autism
spectrum disorder (ASD) have yielded contradictory results. It is unclear whether the current
subtyping of ASD into autistic disorder and Asperger disorder is neurobiologically valid.
Objectives To conduct a quantitative meta-analysis of voxel-based morphometry studies
exploring gray matter volume abnormalities in ASD, to examine potential neurobiological
differences among ASD subtypes, and to create an online database to facilitate replication�…