" ... AS AMERICANS become fatter and fatter — a study published in July revealed that obesity rates increased in 23 states last year and declined in none — a select group of men and women under the watchful care of medical professionals have spent the past few years becoming thinner and thinner. There are 132 of them, located in and around Boston, St. Louis and Baton Rouge, La. All are enrolled in a large clinical trial that is financed by the National Institutes of Health and known as Calerie ... "