@article{nunes_2008,  title={Ethical aspects considered by researchers who use qualitative approaches in health},  volume={13},  ISSN={1413-8123},  url={https://doi.org/10.1590/S1413-81232008000200010},  DOI={10.1590/S1413-81232008000200010},  number={2},  journal={Ciência & Saúde Coletiva},  publisher={ABRASCO - Associação Brasileira de Saúde Coletiva},  author={Nunes, Everardo Duarte},  year={2008},  month={Mar},  pages={351–360} }