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Astronauts' Fainting Spells Lead to Breakthrough

NASA research helps treat women with fainting disorders.
02:21 | 02/29/2012

Transcript for Astronauts' Fainting Spells Lead to Breakthrough

Unusual medical detective story and breakthrough last night we told you about a national campaign launched by doctors to raise awareness. Of the dangers of fainting -- fainting. Could be a sign of... See More
This transcript has been automatically generated and may not be 100% accurate.
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