Encouraging more women to breastfeed their newborn babies would save the NHS money, as babies who are breastfed are healthier, and less likely to develop obesity, according to Dr Clare Relton from the University of Sheffield.
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Sir John rejected the PM's Brexit vision as "unreal and over-optimistic" as he accused negotiators of "souring" the atmosphere for talks.
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White House budget officials outlined the information during a telephone call with reporters given on condition of anonymity.