Some Chinese milk tests positive for toxic chemical

Asian Defense News: Melamine-tainted dairy products have been taken off the shelves of convenience stores in southern China.
Even though it has been more than a year since hundreds of thousands of children became sick or died from tainted milk, the Chinese government has decided to remove the product after health inspectors found some cartons of milk, dating from early 2009, positive for melamine.
Milk in and around the province of Guizhou has been affected by the recall and includes products from three companies, Shandong Zibo Lusaier Dairy, Liaoning Tieling Wuzhou Food and Laoting Kaida Refrigeration.
Melamine in milk can cause kidney stones and kidney failure
The ingredient had originally been added to the milk to trick inspectors who were testing for protein.
Both melamine and protein are high in nitrogen.