A child undergoes a medical check for possible kidney stones at a hospital in Shanghai in this September 27, 2008 file photo. To match Special Report CHINA-MILKPOWDER/ REUTERS/Nir Elias/Files (CHINA -... more 
A child undergoes a medical check for possible kidney stones at a hospital in Shanghai in this September 27, 2008 file photo. To match Special Report CHINA-MILKPOWDER/ REUTERS/Nir Elias/Files (CHINA - Tags: HEALTH SOCIETY) less 
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Reuters | Photo By NIR ELIAS / REUTERS
Thu, Nov 7, 2013 7:16 PM EST