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It's not who you are, but what you do

点击量:   时间:2019-03-06 09:14:02

By Mark Robins A STUDY of 90 000 twins has underlined the overwhelming importance of environmental factors in deciding who gets cancer. The Swedish survey shows that smoking, diet, exposure to chemicals and infection are far more important causes of cancer than inherited genetic defects. Paul Lichtenstein and colleagues at the Karolinska Institute in Stockholm looked at the likelihood of both members of a pair of twins contracting particular cancers. In the biggest ever study of its kind they examined the medical records of 45 000 pairs of twins from archives in Sweden,