Yes. But

来源: viewfinder 于 2010-11-28 22:13:03 [] [博客] [旧帖] [给我悄悄话] 本文已被阅读： 次 (217 bytes)
回答: I know that but how many 80 years old people 由 dudaan 于 2010-11-28 22:02:44

cancer is the second biggest cause of death (or already the biggest?). So quite a fraction of people eventually die from cancer. And there are people who are survivors. If add the two up, 50% is not unlikely...

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