What are the arguments for the cause of autism and how is it being diagnosed/treated? How effective are the treatments?

Keywords:
autism
cause of autism, treatment of autism
autism research, autism treatment research, autism cause research
autism diagnosis, signs of autism
autism in children, children with autism, how children get autism
autism treatment in children, autism causes in children, diagnose* autism in children
effectiveness of diagnose* autism in children, effectiveness of treat* autism in children, most effective way to diagnose autism in children, most effective way to treat autism in children

Ladder of Generalization:
autism; autism in children;cause*/treatment*/diagnose* of autism; cause*/treatment*/diagnose* of autism in children; effectiveness of treatment*/diagnose* in children