@article{widmer_tchack_spano_tzipori_1998,  title={A Study of Cryptosporidium parvum Genotypes and Population Structure},  volume={93},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761998000500021},  DOI={10.1590/S0074-02761998000500021},  number={5},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Widmer, G and Tchack, L and Spano, F and Tzipori, S},  year={1998},  month={Sep},  pages={685–686} }