title: Commentary: environmental influences: issues of timing and type.
authors.affiliation: Division of Developmental and Behavioral Pediatrics/Psychology, Southern Illinois University School of Medicine, 19658, Springfield, IL 62794-9658, USA. gaylward@siumed.edu
authors.forename: Glen P
authors.initials: GP
authors.lastname: Aylward
mesh_terms: D002648:Child; D006233:Persons with Disabilities / Q000145:classification* / Q000706:statistics & numerical data; D006801:Humans; D015995:Prevalence; D012931:Social Environment; D013997:Time Factors