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Fraction surviving curves of dogs with different lung burdens of inhaled plutonium-dioxide aerosols (Figure 4).27 The red circles indicate that the shorter lived control dogs (5% mortality level) have a lifespan of about 3000 days, whereas the dogs in group 1 (initial plutonium lung burden of 0.16 kBq/kg) have a lifespan of about 4500 days, 50% longer. Also shown are the 10% and 50% mortality levels.
