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Childhood asthma prevalence: cross-sectional record linkage study comparing parent-reported wheeze with general practitioner-recorded asthma diagnoses from primary care electronic health records in Wales

Crossref DOI link: https://doi.org/10.1136/bmjresp-2017-000260

Published Online: 2018-01-08

Published Print: 2018-01

Update policy: https://doi.org/10.1136/crossmarkpolicy

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