@article{bittencourt_2003,  title={Portal fibrosis and schistosomal portal hypertension: what is the best strategy for primary and secondary prevention of hemorrhage from esophageal varices},  volume={40},  ISSN={0004-2803},  url={https://doi.org/10.1590/S0004-28032003000100001},  DOI={10.1590/S0004-28032003000100001},  number={1},  journal={Arquivos de Gastroenterologia},  publisher={Instituto Brasileiro de Estudos e Pesquisas de Gastroenterologia e Outras Especialidades - IBEPEGE. },  author={Bittencourt, Paulo L.},  year={2003},  month={Jan},  pages={1–3} }