<http://schema.org/alternativeHeadline>
"Which arm has higher pressure can vary, but it is the size of the difference that counts, not which arm is higher and which is lower."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/health/fitness-well-being/stories/blood-pressure-check-in-both-arms-could-catch-peripheral-artery-di>