Genetically engineered mice don't get obese, but do develop gallstones

Obesity and gallstones often go hand in hand. But not in mice developed at Washington University School of Medicine in St. Louis. Even when these mice eat high-fat diets, they don't get fat, but they do develop gallstones. Researchers say the findings offer clues about genetic factors related to gallstones, and they believe better understanding of those factors may one day allow physicians to monitor people at risk and even, perhaps, to intervene before gallstones become a serious problem...

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