@article{martínez-gómez_ramírez-ospina_ruiz-restrepo_velásquez-lopera_2021,  title={Pyoderma gangrenosum associated to the use of cocaine/levamisole. Series of three cases and literature review<sup>,</sup>},  volume={96},  ISSN={0365-0596},  url={https://doi.org/10.1016/j.abd.2020.06.014},  DOI={10.1016/j.abd.2020.06.014},  number={2},  journal={Anais Brasileiros de Dermatologia},  publisher={Sociedade Brasileira de Dermatologia},  author={Martínez-Gómez, Manuel and Ramírez-Ospina, Joan Andrés and Ruiz-Restrepo, Juan David and Velásquez-Lopera, Margarita María},  year={2021},  month={Mar},  pages={188–195} }