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Number of oral naltrexone prescribers per 1000 Medicare enrollees, 2010 and 2015. A, Number of naltrexone prescribers (per 1000 enrollees) by county 2010. B, Number of naltrexone prescribers (per 1000 enrollees) by county 2015 [Color figure can be viewed at wileyonlinelibrary.com]
