dr. sarah de ferranti, director of preventive cardiology at boston children's hospital, left, meets with patient quinn voccio, 14, of newton, mass., right, in waltham, mass., tuesday, aug. 7, 2012. a government study shows that in the past decade, the proportion of children who have high cholesterol has fallen. the results are surprising, given that the childhood obesity rate didn't budge. (ap photo/steven senne)