After a three-decade tripling in childhood obesity rates, the trend has leveled off and, for the first time, appears to be on a substantial decline - at least among Massachusetts infants and preschoolers, according to a new study. Xiaozhong Wen, HMS research fellow in population medicine at Harvard Pilgrim Health Care, is the lead author. David Ludwig, HMS professor of pediatrics at Children’s Hospital Boston, is also quoted.

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