PVALB and schizophrenia: The prevailing view, therefore, remains that in schizophrenia parvalbumin interneuron abnormalities exist not at the level of neuronal morphology or density, but at the molecular level of gene expression and protein synthesis (Chung et al. 2016a; Enwright Iii et al. 2017; Enwright et al. 2016; Fung et al. 2014; Hashimoto et al. 2008; Joshi et al. 2015; Volk et al. 2016a).