The incidence and mortality rate of breast cancer in American women were 4-5 times higher than Chinese and Japanese.

中日地区与美国比较，美国乳腺癌的发病率及死亡率高于中、日4—5倍。

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The incidence and mortality rate of breast cancer in American women were 4-5 times higher than Chinese and Japanese.

中日地区与美国比较，美国乳腺癌的发病率及死亡率高于中、日4—5倍。

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