The FDA allowed tests to proceed on new varieties of artificial blood even though it should have been aware that the products drastically increased patients' risk of heart attacks and death, according to a review conducted by the National Institutes of Health and Public Citizen, and published in the Journal of the American Medical Association."It's hard to understand," lead researcher Charles Natanson said. "They already had data that these products could cause heart attacks and evidence that they could kill."At question are new kinds of artificial blood that do not require refrigeration. No such products are approved for use in the United States, although at least one variety has been approved in South Africa.
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