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"When taken with higher doses of aspirin (more than 300 milligrams), the experimental antiplatelet drug ticagrelor was associated with worse outcomes than the standard drug, clopidogrel, but the opposite was true with lower doses of aspirin."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2011-06-potent-antiplatelet-drug-effective-low-dose.html>