Philip Stahel at the Denver Health Medical Center led the study in the Archives of Surgery.
And that's the VOA Special English Health Report, available online at voaspecialenglish.com. You can also follow us on Facebook, Twitter, YouTube and iTunes at VOA Learning English. I'm Steve Ember.
Includes reporting by Carol Pearson and Avi Arditti, and sound provided by the Journal of the American Medical Association
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2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25