跟帖 -If cancer-death% stays the same, but the average age gets ol

来源: 二哥 于 2014-01-20 10:00:57 [] [旧帖] [给我悄悄话] 阅读数 : (164 bytes)

Cancer takes time to develop. If cancer-death% stays the same, but the average age gets older, we can say there is medical advance. It's very simple.

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