Knee arthritis twice as common in US since WWII: study
 

http://img-s-msn-com.akamaized.net/t...6&q=60&o=f&l=fKnee osteoarthritis, a painful condition that often strikes older people, is twice as common today in the United States as it was prior to World War II, researchers said Monday. But the reasons for the rise are not simply because obesity is increasingly common, or that people are living longer, said the researchers from Harvard University. The study in the Proceedings of the National Academy of Sciences, a peer-reviewed US journal, did not identify ...

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