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If Stefano Infessura hadn’t registered the first transfusion, scientists would have taken longer to discover.
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If Richart Lower hadn’t made transfusion between two dogs, doctors would haven’t tried in humans.
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If Jean Baptiste Denis hadn’t made the first transfusion in humans, scientists have ruled that posibilidad.
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If James Blundell hasn't made transfusion from human to human, humanity would have lost many people.
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If Nicole M. Arthur hadn't used sodium citrate, could not have developed an anticoagulant.
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If Karl Landsteiner hadn´t discovered blood types, many people would have died.
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If Richard Lewisohn hadn't developed the optimum concentration of sodium citrate, humanity would have lost a lot of blood donated.
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If Luis Exhausts hadn't developed the method for the preservation of blood, hospitals might not have blood banks.
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If Robertson hadn't stored blood during the first world war, humanity would have lost more lives.
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If Serge Yudin had not designed the first blood bank, many people have died from lack of blood.