title: Discussion: research environment and use of multicenter studies in perinatal substance abuse research.
authors.affiliation: Department of Pediatrics, University of Illinois, Chicago 60612.
authors.forename: K C
authors.initials: KC
authors.lastname: Rich
mesh_terms: D004777:Environment; D005260:Female; D006801:Humans; D015337:Multicenter Studies as Topic; D011247:Pregnancy; D011248:Pregnancy Complications / Q000139:chemically induced*; D019966:Substance-Related Disorders / Q000150:complications*