CSPG4 and schizophrenia: In an effort to further characterize the frequency of CSPG4 c.391G > A (p.A131T) in the Netherlands, we performed TaqMan genotyping and Sanger sequencing validation in an independent Dutch cohort of 1219 schizophrenia cases and in the general population-based Rotterdam Study cohort [37] (10,611 subjects).