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The Policy Research Programme, Department of Health, UK.
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Julia Granerød
Figgjo (Norway)
Helen E. Ambrose
Nicholas Davies
The Lancet Infectious Diseases
University College London
UNSW Sydney
University of Liverpool
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Granerød et al. (Mon,) studied this question.
synapsesocial.com/papers/69d9704fa1d151c65f6840c1 — DOI: https://doi.org/10.1016/s1473-3099(10)70222-x