For a child, if the level of lead in the blood exceeds 100 microgram/litre, it indicates that he or she is suffering from poisoning. Experts estimate that about 51 percent of 120 million Chinese...
Please login first!
For a child, if the level of lead in the blood exceeds 100 microgram/litre, it indicates that he or she is suffering from poisoning. Experts estimate that about 51 percent of 120 million Chinese...