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David Boulware, MD MPH
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What are the limitations of observational registry studies? One major issue is confounding by indication. How physicians act is not the same as a Randomized Clinical Trial testing a therapy
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Today, the independent Data and Safety Monitoring Board (DSMB) for the #COVID-19 post-exposure prophylaxis trial has reviewed the cumulative safety data from 783 participants in the ongoing #hydroxychloroquine prevention trial.
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