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PMID 9701154. Check date values in: |date= (help) ↑ Rice, Amy L. Comparative quantification of health risks.
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PMID 9701154. ↑ Rice, Amy L. Comparative quantification of health risks. WHO. pp. 238–240. ↑ Sommer A, Katz J, Tarwotjo I (November 1984).