Analysis of studies testing the effectiveness of chelation therapy for autism did not find evidence it works

An article reporting a review of research done on the use of chelation therapy for the treatment of autism printed in the January 2013 issue of Research in Autism Spectrum Disorders analyzed five studies done on the efficacy of the treatment   Chelation involves injecting a chemical compound into the blood stream that bonds to heavy metals and causes them to be excreted in urine.  It is used to treat mercury poisoning for example.  Four of the five studies reviewed showed mixed results.  One showed positive results, but problems in the nature of the methods used in the research leaves it unable to not support the use of the therapy as an effective treatment according to the researchers.  Read more about it at reuters.com here:
http://www.reuters.com/article/2012/12/21/us-chelation-autism-idUSBRE8BK17220121221
Read the research article at sciencedirect.com here:
http://www.sciencedirect.com/science/article/pii/S1750946712000724