@article{iuppen_sampaio_stadñik_2011,  title={Patients' satisfaction with the implementation of the concept of pain as the fifth vital sign to control postoperative pain},  volume={12},  ISSN={1806-0013},  url={https://doi.org/10.1590/S1806-00132011000100007},  DOI={10.1590/S1806-00132011000100007},  number={1},  journal={Revista Dor},  publisher={Sociedade Brasileira para o Estudo da Dor},  author={Iuppen, Lisiane Specht and Sampaio, Fernanda Herbstrith de and Stadñik, Claudio Marcel Berdún},  year={2011},  month={Jan},  pages={29–34} }