The screening and diagnosis of autistic spectrum disorders. - Filipek,P.A.; Accardo,P.J.; Baranek,G.T.; Cook jr,E.H.; Dawson,G.; Gordon,B.; Gravel,J.S.; Johnson,C.P.; Kallen,R.J.; Levy,S.E.; Minshew,N.; Prizant,B.M.; et al. (Journal of Autism and Developmental Disorders, 1999)