@article{souza_silveira_2012,  title={Comment on "The burden and quality of life of caregivers of sickle cell anemia patients taking hydroxyurea versus those not taking hydroxyurea"},  volume={34},  ISSN={1516-8484},  url={https://doi.org/10.5581/1516-8484.20120064},  DOI={10.5581/1516-8484.20120064},  number={4},  journal={Revista Brasileira de Hematologia e Hemoterapia},  publisher={Associação Brasileira de Hematologia e Hemoterapia e Terapia Celular},  author={Souza, José Carlos and Silveira, Jucimara Zacarias M.},  year={2012},  pages={256–257} }