In this Thursday, January 2, 2014 file photo, 7-month-old boy Dhieu Ding Chol, left, and 5-month-old boy Thuch Jong Kuch, right, are held by their mothers as they receive treatment for dehydration, vomiting and diarrhea, likely caused by the lack of any sanitation where they are now living, at a clinic run by Medecins Sans Frontieres (Doctors Without Borders) set up in a school building in the town of Awerial, South Sudan. (Photo by Ben Curtis/AP Photo)
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