Restaurant chains with locations in cities, such as Philadelphia, that require eateries to post calorie counts have added more healthy dishes to their national menus, while chains without units in those cities haven't, according to new research from Drexel University. "That gives me hope that there will be even more changes once menu labeling is in effect nationally," said Margo G. Wootan, nutrition-policy director for the Center for Science in the Public Interest.

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