Forest plot showing the association between <i>PDE4B</i> SNPs and schizophrenia under allelic model.

<p>Forest plot showing the association between <i>PDE4B</i> SNPs and schizophrenia under allelic model.</p

Forest plot showing the association between <i>PDE4B</i> SNPs and schizophrenia under recessive model.

<p>Forest plot showing the association between <i>PDE4B</i> SNPs and schizophrenia under recessive model.</p

Forest plot showing the association between <i>PDE4B</i> SNPs and schizophrenia under dominant model.

<p>Forest plot showing the association between <i>PDE4B</i> SNPs and schizophrenia under dominant model.</p

PRISMA flow diagram showing study selection process.

<p>PRISMA flow diagram showing study selection process.</p