I guess what's new is that the scientists found a way to distinguish between cancer dna and other altered/mutated dna so they reduce the occurrence of false pos

I guess what's new is that the scientists found a way to distinguish between cancer dna and other altered/mutated dna so they reduce the occurrence of false positives. http://fortune.com/2017/06/03/liquid-biopsy-grail-blood-cancer/ http://fortune.com/2017/06/03/liquid-biopsy-grail-blood-canc... https://www.technologyreview.com/s/607944/grails-1-billion-bet-on-the-perfect-cancer-test/ https://www.technologyreview.com/s/607944/grails-1-billion-b...