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

来源: 于 2014-01-20 10:00:57 [旧帖] [给我悄悄话] 本文已被阅读：次

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.