Shao Wenting, 1 year and 3 months old, lies on bed suffering from kidney stones after drinking Sanlu milk powder at a hospital in in Chengdu, Sichuan province, China, Saturday, Sept. 20, 2008. China's leaders were scrambling to contain public dismay over widespread contamination of milk supplies, castigating local officials for negligence while moving to tamp down criticism of the government's response. Officials promised to keep stores supplied with clean milk and set up medical hot lines nationwide to help people cope with one of the worst product safety scandals in years.(AP Photo/Color China Photo)

A young Chinese child at a hospital in Hefei in eastern China's Anhui province after drinking tainted milk. China's cabinet has ordered an all-out effort to save babies poisoned by contaminated milk powder which has claimed the lives of four infants and made thousands more ill.(AFP/File)

A worker removes all the Chinese milk powder brands from the shelves of a French supermarket chain Carrefour in Hefei in eastern China's Anhui province. China's cabinet has ordered an all-out effort to save babies poisoned by contaminated milk powder which has claimed the lives of four infants and made thousands more ill.(AFP)

Chinese parents with their babies seeking treatment at a hospital in Hangzhou. China's cabinet has ordered an all-out effort to save babies poisoned by contaminated milk powder which has claimed the lives of four infants and made thousands more ill.

A child receives an ultrasonic inspection for kidney stones at a children's hospital in Chengdu, in southwest China's Sichuan province Friday, Sept. 19, 2008. Thousands of worried parents have filled hospitals, many hovering over sons and daughters hooked to IV drips after drinking milk powder tainted with melamine, a toxic industrial chemical that can cause kidney stones and lead to kidney failure. Some 1,300 babies, mostly newborns, remain hospitalized, with 158 suffering from acute kidney failure.(AP Photo/Color China Photo)

Parents and their children wait for health inspections at a children's hospital in Chengdu of southwest China's Sichuan province Friday, Sept. 19, 2008. Thousands of worried parents have filled hospitals, many hovering over sons and daughters hooked to IV drips after drinking milk powder tainted with melamine, a toxic industrial chemical that can cause kidney stones and lead to kidney failure. Some 1,300 babies, mostly newborns, remain hospitalized, with 158 suffering from acute kidney failure.(AP Photo/Color China Photo)

Parents and their children wait for health inspection at a children's hospital in Chengdu, in southwest China's Sichuan province Friday, Sept. 19, 2008. Thousands of worried parents have filled hospitals, many hovering over sons and daughters hooked to IV drips after drinking milk powder tainted with melamine, a toxic industrial chemical that can cause kidney stones and lead to kidney failure. Some 1,300 babies, mostly newborns, remain hospitalized, with 158 suffering from acute kidney failure.(AP Photo/Color China Photo)

Chinese consumers line up with tainted milk formula products to get a refund at a processing plant for Sanlu Group Co. whose milk formula products were found to contain banned substances in Shijiazhuang, northern China's Hebei province, Thursday, Sept. 18, 2008. Chinese police arrested 12 more people Thursday as a fourth death was reported in a scandal involving tainted milk powder that has sickened more than 6,200 babies.(AP Photo/Ng Han Guan)

Hundreds of residents bring tainted milk formula products for refunds at a processing plant for Sanlu Group Co. which milk formula products were found to contain banned substances in Shijiazhuang, northern China's Hebei province, Thursday, Sept. 18, 2008. Chinese police arrested 12 more people Thursday as a fourth death was reported in a scandal involving tainted milk powder that has sickened more than 6,200 babies.(AP Photo/Ng Han Guan)

A woman, right, holds her 14-month-old baby as they wait to check for kidney stones in a hospital in Fuyang in central China's Anhui province Thursday, Sept. 18, 2008. Chinese police arrested 12 more people Thursday as a fourth death was reported in a scandal involving tainted milk powder that has sickened more than 6,200 babies.(AP Photo)

A group of parents gather at a Sanlu milk powder distributor office in Wuhan, central China's Hubei province, to try to get refunds for the milk they bought, only to find the office closed, September 16. China has said more than 6,000 babies have fallen ill and three died after drinking milk powder laced with a toxic chemical.(AFP/File)

A child receives a medical check for possible kidney stones at a hospital in Suining, Sichuan province September 17, 2008. China said on Wednesday a third infant had died after drinking contaminated milk and the number sick had leapt to many thousands, while an official said the health threat was concealed for at least a month.REUTERS/Stringer