Figure 1.

Upper Gastrointestinal Bleed Events Defined in Linked HES and GPRD Data, England, 1997–2010. The percentages shown are of the combined unique events in box 1. GPRD- General Practice Research Database; HES - Hospital Episodes Statistics; ICD 10 - International Classification of Diseases 10th Edition; GI - Gastrointestinal; READ- Read code.

Crooks et al. BMC Health Services Research 2012 12:392   doi:10.1186/1472-6963-12-392
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