TY - JOUR AU - Herrett, E; Thomas, S L; Schoonen, W M; Smeeth, L; Hall, A J TI - Validation and validity of diagnoses in the General Practice Research Database: a systematic review JO - Br J Clin Pharmacol IS - 01 VL - 69 PY - 2010 DO - 10.1111/j.1365-2125.2009.03537.x L3 - PubMed-ID: 20078607 SP - 4 EP - 14 ER -