For example, companies have offered prenatal blood tests to examine fetal chromosomes, using a technique called cell-free DNA testing.
Los Angeles Times(Jun 19, 2016)
Your bedroom should also be one of those cell-free zones.
Time(Feb 24, 2016)
Cell-free DNA is like a message in a bottle, delivering secrets about what’s happening inside our bodies.
New York Times(Jan 14, 2016)