@article{perroca_2011,  title={Development and content validity of the new version of a patient classification instrument},  volume={19},  ISSN={0104-1169},  url={https://doi.org/10.1590/S0104-11692011000100009},  DOI={10.1590/S0104-11692011000100009},  number={1},  journal={Revista Latino-Americana de Enfermagem},  publisher={Escola de Enfermagem de Ribeirão Preto / Universidade de São Paulo},  author={Perroca, Marcia Galan},  year={2011},  month={Jan},  pages={58–66} }