Autistic DisorderChild Development Disorders, PervasiveAsperger SyndromeIrritable MoodStereotyped BehaviorCommunication DisordersLanguage Development DisordersSocial Behavior DisordersChromosomes, Human, Pair 15Social BehaviorInterview, PsychologicalGenetic MarkersPsychometricsLinkage DisequilibriumReproducibility of ResultsCase-Control StudiesBipolar DisorderMental Disorders