@article{articlea26c1347,
title   = {Crowding: risk factor or protective factor for lower respiratory disease in young children?},
author = {Cardoso, Maria Regina Alves and Cousens, Simon Nicholas and Siqueira, Luiz Fernando de Góes and Alves, Fátima Maria and D'Angelo, Luiz Antônio},
year = {2004},
doi = {10.1186/1471-2458-4-19},
journal   = {BioMed Central Public Health}
}