%0 Journal Article %T Validation and validity of diagnoses in the General Practice Research Database: a systematic review %A Herrett, Emily %A Thomas, Sara L %A Schoonen, W Marieke %A Smeeth, Liam %A Hall, Andrew J %J British Journal of Clinical Pharmacology %V 69 %N 1 %P 4-14 %@ 0306-5251 %D 2010-01-01 %I Blackwell Science Inc %~ DeepDyve