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Analysts say that the experience of shopping at Whole Foods might change in the near future now that the retailer is being bought by Amazon. Stephen Hilger/Bloomberg/Getty Images hide caption

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Stephen Hilger/Bloomberg/Getty Images

A lab technician at the Mothers' Milk Bank Northeast in Newton Upper Falls, Mass., prepares donated breast milk for pasteurization in August 2012. The process kills harmful bacteria. Elise Amendola/Associated Press hide caption

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Elise Amendola/Associated Press