The incidence of<unk>  is approximately 100 per 100,000 individuals in the outpatient setting. There is no enough data on prevalence of<unk> . The mortality rate of patients with massive<unk>  is approximately 50-100%, if left untreated. During 1995-2005, in-hospital mortality rate of massive<unk>  was 0-15%. Patients of all age groups may develop<unk> . There is no racial predilection to<unk> .<unk>  affects men and women equally.<unk>  is a symptom that might affect everyone. Underlying causes of<unk>  might be different in developed countries than in developing countries. In the United States, incidence of tuberculosis in patients with massive<unk>  is 7%, while in south africa it is 85%.
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