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Meals and Drug Administration says 62 deaths are associated with allergic-style reactions to contaminated batches of heparin. The FDA cannot say for sure what caused the reactions, but the chief suspect is a contaminant that the agency discovered in products of raw heparin coming from China.. China Voices Doubts More than Tainted Heparin Chinese officials voiced doubts Monday a contaminant determined in the blood slimmer heparin was the primary cause of severe allergic reactions in hundreds of Americans.According to the Stanford Focus on Longevity and the Berlin Max Planck Institute for Individual Development, there is no reliable scientific evidence to support the idea that cognitive teaching can improve overall mind performance . Certainly, 70 of the world’s leading neuroscientists and cognitive scientists took the unusual step of signing a statement that directly issues the claims made for brain video games: We object to the declare that brain games offer customers a scientifically grounded avenue to lessen or invert cognitive decline when there is absolutely no compelling scientific evidence to date that they do.