@article{pierre-filho_pierre_nascimento_marcondes_2004,  title={Central retinal vein prethrombosis as an initial manifestation of protein S deficiency},  volume={122},  ISSN={1516-3180},  url={https://doi.org/10.1590/S1516-31802004000300012},  DOI={10.1590/S1516-31802004000300012},  number={3},  journal={Sao Paulo Medical Journal},  publisher={Associação Paulista de Medicina - APM},  author={Pierre-Filho, Paulo de Tarso Ponte and Pierre, Alessandra Maria Mont'Alverne and Nascimento, Maurício Abujamra and Marcondes, Ana Maria},  year={2004},  month={May},  pages={134–135} }