Air pollution and anemia as risk factors for pneumonia in ecuadorian children: a retrospective cohort analysis.
Harris, Aaron M.
Sempértegui, Fernando.
Estrella, Bertha.
Narváez, Ximena.
Egas, Juan.
Woodin, Mark.
Durant, John L.
Naumova, Elena N.
Griffiths, Jeffrey K.
2011