@article{machado_guerra_branco_2012,  title={Validation of a protocol to assist patients with intra-aortic balloon},  volume={25},  ISSN={0103-2100},  url={https://doi.org/10.1590/S0103-21002012000800003},  DOI={10.1590/S0103-21002012000800003},  number={spe1},  journal={Acta Paulista de Enfermagem},  publisher={Escola Paulista de Enfermagem, Universidade Federal de São Paulo},  author={Machado, Regimar Carla and Guerra, Grazia Maria and Branco, João Nelson Rodrigues},  year={2012},  pages={13–19} }