Mari Baker, president and chief executive officer of Navigen

UNITED STATES - APRIL 29: Mari Baker, president and chief executive officer of Navigenics Inc., speaks during the Milken Institute Global Conference 2008 in Los Angeles, California, U.S., on Tuesday, April 29, 2008. The annual conference brings together scientists, business executives, philanthropists, journalists, academics and Nobel laureates to discuss today's most pressing social, political and economic challenges, according to the Institute's Web site. (Photo by Jamie Rector/Bloomberg via Getty Images)