Sylvia Burwell @SecBurwell
Dr. Califf's life in medicine & research has positively impacted many Americans. As head of @US_FDA, he will improve the lives of many more. — PolitiTweet.org
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Wed Feb 24 18:03:20 +0000 2016
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Likely AvailableSylvia Burwell @SecBurwell
Dr. Califf's life in medicine & research has positively impacted many Americans. As head of @US_FDA, he will improve the lives of many more. — PolitiTweet.org