@article{sher_2011,  title={Brain-derived neurotrophic factor and suicidal behavior in patients with posttraumatic stress disorder},  volume={33},  ISSN={1516-4446},  url={https://doi.org/10.1590/S1516-44462011000100024},  DOI={10.1590/S1516-44462011000100024},  number={1},  journal={Brazilian Journal of Psychiatry},  publisher={Associação Brasileira de Psiquiatria},  author={Sher, Leo},  year={2011},  month={Mar},  pages={105–106} }