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Superfreakonomics

[Global Cooling, Patriotic Prostitutes, and Why Suicide Bombers Should Buy Life Insurance]
May 05, 2013sky123 rated this title 4 out of 5 stars
http://graphics8.nytimes.com/images/blogs/freakonomics/posts/WashWeb.jpg Cedars-Sinai's screen saver increased frequency of doctors washing hands.