@article{articlef315b57c,
title   = {Effectiveness of influenza vaccination in elderly outpatients in São Paulo city, Brazil},
author = {Gutierrez, Eliana Battaggia and Li, Ho Yeh and Santos, Ana Catarina de Seixas and Lopes, Marta Heloísa},
year = {2001},
doi = {10.1590/s0036-46652001000600003},
journal   = {Revista do Instituto de Medicina Tropical de São Paulo}
}