- Further evidence for association of variants in the AKT1 gene with schizophrenia in a sample of European sib-pair families. Schwab, S.G., Hoefgen, B., Hanses, C., Hassenbach, M.B., Albus, M., Lerer, B., Trixler, M., Maier, W., Wildenauer, D.B. Biol. Psychiatry (2005)