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Online:
JAMA: http://jama.ama-assn.org
Gastric bypass surgery: http://1.usa.gov/KMZQkH
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AP Medical Writer Lindsey Tanner can be reached at http://www.twitter.com/LindseyTanner
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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