| http://www.w3.org/ns/prov#value | - For the etiology-specific analyses, we excluded 8% of children, including 5 cases positive for both viral and bacterial agents, 27 controls positive for bacterial agents, 24 controls positive for viral agents, 13 cases and 15 controls positive for pathogenic parasites, and 20 cases in the unknown etiology group from whom a second sample was positive within 40 days of entering the study.
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