title: Obstetric care provider density and delayed onset of prenatal care.
authors.affiliation: Department of Preventive Medicine, Vanderbilt University, Nashville, TN 37232-2637, USA.
authors.forename: J M
authors.initials: JM
authors.lastname: Piper
authors.forename: E F
authors.initials: EF
authors.lastname: Mitchel
authors.forename: W A
authors.initials: WA
authors.lastname: Ray
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006302:Health Services Research; D006801:Humans; D008507:Medically Underserved Area; D009774:Obstetrics; D016017:Odds Ratio; D011247:Pregnancy; D018566:Pregnancy, High-Risk; D011295:Prenatal Care / Q000592:standards*; D012189:Retrospective Studies; D012307:Risk Factors; D013714:Tennessee; D013997:Time Factors; D000078329:Workforce