Gray and white matter density changes in monozygotic and same-sex dizygotic twins discordant for schizophrenia using voxel-based morphometry. - Hilleke E. Hulshoff Pol; Hugo G. Schnack; René C. W. Mandl; Rachel G. H. Brans; Neeltje E. M. van Haren; Wim F. C. Baaré; Clarine J. van Oel; D. Louis Collins; Alan C. Evans; René S. Kahn (NeuroImage, 2006)