@article{articled3624301,
title   = {Effectiveness of the polysaccharide pneumococcal vaccine among HIV-infected persons in Brazil: a case control study},
author = {Veras, Maria Amelia S. M. and Enanoria, Wayne T. A. and Castilho, Euclides A. and Reingold, Arthur},
year = {2007},
doi = {10.1186/1471-2334-7-119},
journal   = {BMC Infectious Diseases}
}