Timothy Ring, chairman and chief executive officer of CR Bard Inc., speaks during the Cleveland Clinic's 2010 Medical Innovation Summit titled "Obesity, Diabetes, & The Metabolic Crisis" in Cleveland, Ohio, U.S., on Tuesday, Nov. 2, 2010. The number of people in the U.S. who are obese has more than doubled in the past 30 years to 72 million, according to the U.S. Centers for Disease Control. Photographer: David Maxwell/Bloomberg via Getty Images