Validation of asthma recording in the Clinical Practice Research Datalink (CPRD).

Nissen, F; Morales, DR; Mullerova, H; Smeeth, L; Douglas, IJ; Quint, JK; (2017) Validation of asthma recording in the Clinical Practice Research Datalink (CPRD). BMJ open, 7 (8). e017474. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2017-017474

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