@article{contreras zuniga_gomez mesa_zuluaga martinez_ocampo_andres urrea_2009,  title={Angina de Prinzmetal},  volume={93},  ISSN={0066-782X},  url={https://doi.org/10.1590/S0066-782X2009000800023},  DOI={10.1590/S0066-782X2009000800023},  number={2},  journal={Arquivos Brasileiros de Cardiologia},  publisher={Sociedade Brasileira de Cardiologia - SBC},  author={Contreras Zuniga, Eduardo and Gomez Mesa, Juan Esteban and Zuluaga Martinez, Sandra Ximena and Ocampo, Vanesa and Andres Urrea, Cristian},  year={2009},  month={Aug},  pages={e30–e32} }