@article{261a96f0ad9611debc73000ea68e967b,
title = "Epidemiological studies of the non-specific effects of vaccines: II--methodological issues in the design and analysis of cohort studies",
abstract = "We review sources of bias which can affect non-randomized cohort studies of non-specific effects of vaccines on child mortality. Using examples from the literature on non-specific effects, we describe different sources of selection and information bias, and, where possible, outline analysis strategies to mitigate or eliminate such biases.",
author = "Farrington, {C P} and Firth, {M J} and Moulton, {L H} and H Ravn and S Evans and {Working Group on Non-specific Effects of Vaccines} and Andersen, {Per Kragh}",
note = "Keywords: Bias (Epidemiology); Child, Preschool; Cohort Studies; Forms and Records Control; Humans; Infant; Medical Records; Vaccination; Vaccines",
year = "2009",
doi = "10.1111/j.1365-3156.2009.02302.x",
language = "English",
volume = "14",
pages = "977--85",
journal = "Tropical Medicine & International Health",
issn = "1360-2276",
publisher = "Wiley-Blackwell",
number = "9",
}