title: Smiling response, stranger anxiety, and autistic disorder.
authors.affiliation: UCLA Medical School, Los Angeles, CA, USA, eritvo@aol.com.
authors.forename: Edward R
authors.initials: ER
authors.lastname: Ritvo
mesh_terms: D001007:Anxiety; D001321:Autistic Disorder / Q000523:psychology*; D006801:Humans; D007398:Interpersonal Relations; D012904:Smiling