Are you age smart? When it comes to aging, how much do you know? Test your knowledge with this age smart quiz from Dr. Oz and Dr. Roizen.
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- Buettner, Dan. "Report from the 'Blue Zone': Why Do People Live Long in Costa Rica?" ABC News. Feb. 2, 2007. (June 25, 2008) http://abcnews.go.com/Technology/LivingLonger/story?id=2843049&page=1
- Buettner, Dan. "The Blue Zones: Lessons for Living Longer From the People Who've Lived the Longest." Washington, D.C.: National Geographic, 2008.