The unorthodox practice of chelation No one knows for certain what causes autism, but one theory has ignited an intense debate Autism is a mysterious and devastating disorder that is believed to affect as many as 500,000 children in this country. No one knows for certain what causes autism, but one theory — chelation— has sparked controversy. Now, Jim Adams wants to put that theory to the test. In a desperate quest for answers, he is using his scientific know-how to test a controversial therapy called "chelation." And he has a special reason for taking on this mission — his...