<http://schema.org/description>
"Screening tests for cervical, colon and breast cancers are the most effective, but U.S. experts advise avoiding eight other cancer tests."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2013/01/31/Some-cancer-screening-not-worth-doing/UPI-32391359688072/>