@article{dillenburg_kruel_cerski_edelweiss_silva_schier_2008,  title={Morphine does no promote esophageal carcinogenesis in rats exposed to diethylnitrosamine},  volume={45},  ISSN={0004-2803},  url={https://doi.org/10.1590/S0004-28032008000100016},  DOI={10.1590/S0004-28032008000100016},  number={1},  journal={Arquivos de Gastroenterologia},  publisher={Instituto Brasileiro de Estudos e Pesquisas de Gastroenterologia e Outras Especialidades - IBEPEGE. },  author={Dillenburg, Carlos Frota and Kruel, Cleber Dario Pinto and Cerski, Carlos Thadeu and Edelweiss, Maria Isabel and Silva, Tiago Luís Dedavid e and Schier, André Silvio},  year={2008},  month={Jan},  pages={87–92} }