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"Rett syndrome, a rare genetic disorder that causes mental retardation, autism, and physical deformities, has no cure. However, a small clinical trial has found that a growth factor known as IGF1 can help treat some symptoms of the disease."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2014-06-rett-syndrome-drug-clinical-trial.html>