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Acknowledgment The author wishes to acknowledge the contribution to the previous edition of this chapter by Dr. David Bandola. Risk Incidence of 5.5:100,000 person years at risk (50,000 new cases per y in USA). Prevalence of 21:100,000 person years at…
Case Synopsis A 60-year-old man with a history of osteoarthritis has been taking naproxen for the past 3 years without complications or side effects. He experienced sudden severe nausea and vomited frank blood. He was taken to the emergency department…