@article{suffys_vanderborght_santos_correa_bravin_kritski_2001,  title={Inhibition of the polymerase chain reaction by sputum samples from tuberculosis patients after processing using a silica-guanidiniumthiocyanate DNA isolation procedure},  volume={96},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02762001000800019},  DOI={10.1590/S0074-02762001000800019},  number={8},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Suffys, Philip and Vanderborght, Patricia Rosa and Santos, Patricia Barros dos and Correa, Leticia Almeida Pinto and Bravin, Yolanda and Kritski, Afranio Lineu},  year={2001},  month={Nov},  pages={1137–1139} }