title: What is PDD-NOS and how is it diagnosed?
authors.forename: G B
authors.initials: GB
authors.lastname: Mesibov
mesh_terms: D001321:Autistic Disorder / Q000145:classification / Q000175:diagnosis*; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000145:classification / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D011569:Psychiatric Status Rating Scales