Although many theories regarding the etiology of autism have been proposed, the cause is not yet clear. It has been suggested that autism may be caused by genetic, immunological, metabolic, and environmental factors. This issue is the topic of much debate and is currently the focus of many autism research endeavors. Additionally, there is no known cure for autism, and there are diverse views amongst those in the autism community regarding the possible benefits of a cure. However, common treatments and interventions target early and intensive education which can help the individual improve their social, communication, and cognitive skills. Common treatments and interventions include sensory integration therapy, nutritional therapy, intensive educational therapy, music therapy, play therapy, Developmental Individual-Difference Relationship-based Model/Floortime, Relationship Development Intervention, Treatment and Education of Autistic and Related Communication-handicapped Children (TEACCH), augmentative and alternative communication (AAC) strategies, including facilitated communication, Applied Behavior Analysis (ABA), pharmacological treatments and comprehensive treatment programs.