@article{luiz_cabral_2010,  title={Sensitivity analysis for an unmeasured confounder: a review of two independent methods},  volume={13},  ISSN={1415-790X},  url={https://doi.org/10.1590/S1415-790X2010000200002},  DOI={10.1590/S1415-790X2010000200002},  number={2},  journal={Revista Brasileira de Epidemiologia},  publisher={Associação Brasileira de Saúde Coletiva},  author={Luiz, Ronir Raggio and Cabral, Maria Deolinda Borges},  year={2010},  month={Jun},  pages={188–198} }