@article{vallada filho_samaia_2000,  title={Esquizofrenia: aspectos genéticos e estudos de fatores de risco},  volume={22},  ISSN={1516-4446},  url={https://doi.org/10.1590/S1516-44462000000500002},  DOI={10.1590/S1516-44462000000500002},  journal={Brazilian Journal of Psychiatry},  publisher={Associação Brasileira de Psiquiatria},  author={Vallada Filho, Homero P and Samaia, Helena},  year={2000},  month={May},  pages={2–4} }