<http://schema.org/alternativeHeadline>
"Myocardial infarctions can be determined sooner with the new troponin test, according to Dr. Chadwick Miller."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/videos/a-blood-test-to-rule-out-heart-attacks>