@article{koifman_koifman_1997,  title={Stomach cancer incidence in Brazil: an ecologic study with selected risk factors},  volume={13},  ISSN={0102-311X},  url={https://doi.org/10.1590/S0102-311X1997000500009},  DOI={10.1590/S0102-311X1997000500009},  journal={Cadernos de Saúde Pública},  publisher={Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz},  author={Koifman, Sergio and Koifman, Rosalina Jorge},  year={1997},  pages={S85–S92} }