title: Is 18 months too early for the CHAT?
authors: S H
authors: SH
authors: Willemsen-Swinkels
authors: J K
authors: JK
authors: Buitelaar
authors: H
authors: H
authors: van Engeland
mesh_terms: D000367:Age Factors; D001321:Autistic Disorder / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D009483:Neuropsychological Tests