@article{castro_clark_atallah_1997,  title={Optimal search strategy for clinical trials in the Latin American and Caribbean Health Science Literature Database (LILACS)},  volume={115},  ISSN={1516-3180},  url={https://doi.org/10.1590/S1516-31801997000300004},  DOI={10.1590/S1516-31801997000300004},  number={3},  journal={Sao Paulo Medical Journal},  publisher={Associação Paulista de Medicina - APM},  author={Castro, Aldemar Araujo and Clark, Otávio Augusto Câmara and Atallah, Alvaro Nagib},  year={1997},  month={May},  pages={1423–1426} }