Scientists are skeptical about the secret blood test that has made Elizabeth Holmes a billionaire

Faster, cheaper, better. An innovation that accomplishes those three things has the potential to disrupt an industry. But such innovations are rare. Theranos, a company founded by Stanford sophomore Elizabeth Holmes in the fall of 2003 (she dropped out a few months later) has generated a lot of buzz for developing a revolutionary approach to the blood test. Theranos' innovation theoretically does clinical lab testing faster, cheaper, and, in some ways, better. Because of that, Theranos could upe...