title: Classification of emergency department visits: how many are necessary?
authors.affiliation: Center for Health Data and Analysis, Brown Medical School, USA.
authors.forename: Jay S
authors.initials: JS
authors.lastname: Buechner
authors.forename: Karen A
authors.initials: KA
authors.lastname: Williams
mesh_terms: D004636:Emergency Service, Hospital / Q000145:classification / Q000706:statistics & numerical data*; D006801:Humans; D012237:Rhode Island