Accuracy of ICD-9 codes in identifying patients with peptic ulcer and gastrointestinal hemorrhage in the regional healthcare administrative database of Umbria | PLOS ONE
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Retrospective analysis of different therapeutic approaches for retroperitoneal duodenal perforations | Scientific Reports
The Oxford college of pharmacy - Peptic ulcer Classification and external resources Deep gastric ulcer ICD-10 K25–K27 ICD-9 531–534 DiseasesDB 9819 eMedicine med/1776 ped/2341 MeSH D010437 A peptic ulcer, also known as
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