Meta-Analysis of Six Genes (BDNF, DRD1, DRD3, DRD4, GRIN2B and MAOA) Involved in Neuroplasticity and the Risk for Alcohol Dependence … Source: Meta-Analysis of Six Genes (BDNF, DRD1, DRD3, DRD4, GRIN2B and MAOA) Involved in Neuroplasticity and the Risk for Alcohol Dependence