Complexin2 null mutation requires a ‘second hit’ for induction of phenotypic changes relevant to schizophrenia. - Radyushkin, K.; El-Kordi, A.; Boretius, S.; Castaneda, S.; Ronnenberg, A.; Reim, K.; Bickebö;ller, H.; Frahm, J.; Brose, N.; Ehrenreich, H. (Genes, Brain & Behavior, 2010)