A post-mortem study conducted by Chojnicka et al. [29] found no association between BDNF rs6265 and suicide in 557 autopsied suicide victims in a heterogenous population, including 181 individuals with a confirmed history of psychiatric disorder (i.e., depression, schizophrenia, other unknown) and alcohol and/or drug addiction. This evidence concerns the gene BDNF and depressive symptom measurement.