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1997年5月1《美国医学论坛报》报道，美国国立癌症研究所（NCI）宣布，40岁—49岁年龄段的妇女每隔1－2年应作一次乳房X线拍片检查。他们以前的主张是从50岁才开始这样做。美国癌症学会（ACh）的主张却略有不同，他们以前的宣传是叙岁-49岁年龄段的妇女应每1-2年拍乳房片作为预
In May 1997, the “American Medical Tribune” reported that the National Cancer Institute (NCI) announced that women aged 40 to 49 should have a mammogram every 1-2 years. Their previous claim was to start doing this from the age of 50. The American Cancer Society’s (ACh) claims are slightly different. Their previous propaganda was that women in the Syrian-49 age group should take a 1-2 year s