neoplasm
• by 17 months of age, 45% of female mice develop mammary or lymphoid tumors
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• in 20% of female mice
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• in 20% of female mice
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• in 5% of female mice
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endocrine/exocrine glands
• 30% to 40% of male mice exhibit development of the mammary ductal system by 7 months of age
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• in 20% of female mice
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integument
• 30% to 40% of male mice exhibit development of the mammary ductal system by 7 months of age
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• in 20% of female mice
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