A simple brain trace can identify autism in children as young as two years old, scientists believe. A US team at Boston Children's Hospital say EEG traces, which record electrical brain activity using scalp electrodes, could offer a diagnostic test for this complex condition [source 1="<a" href="http://www.bbc.co.uk/news/health-18577327" 2="target="_blank">BBC" 3="News</a>" language=":"][/source]. If only the early detection…