"We highly suspect that it might be some form of acutepoisoning from something that they had eaten, but we are still waiting for the laboratory results, " Nathan said.
Developed to remove arsenic from soldiers gassed during World War I, the method is used in mainstream medicine for rare cases of acute heavy metal poisoning.
Most of the CPSC injury data is based on reports of emergency room visits, something a child who has ingested lead will usually avoid unless he or she develops an acute case of lead poisoning.