@article{guerra_2000,  title={Preface},  volume={23},  ISSN={1415-4757},  url={https://doi.org/10.1590/S1415-47572000000400034},  DOI={10.1590/S1415-47572000000400034},  number={4},  journal={Genetics and Molecular Biology},  publisher={Sociedade Brasileira de Genética},  author={Guerra, Marcelo},  year={2000},  month={Dec},  pages={916–916} }