title: Overview: new perspectives on the stubborn challenge of preterm birth.
authors.affiliation: Department of Pediatrics, University of Colorado School of Medicine, Denver, CO, USA.
authors.forename: R B
authors.initials: RB
authors.lastname: Johnston
authors.forename: M A
authors.initials: MA
authors.lastname: Williams
authors.forename: C J
authors.initials: CJ
authors.lastname: Hogue
authors.forename: D R
authors.initials: DR
authors.lastname: Mattison
mesh_terms: D003226:Congresses as Topic; D005260:Female; D005582:Foundations; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007234:Infant, Premature; D009747:Nutritional Physiological Phenomena; D007752:Obstetric Labor, Premature / Q000209:etiology / Q000517:prevention & control*; D011247:Pregnancy; D011295:Prenatal Care; D015397:Program Evaluation; D012106:Research; D012307:Risk Factors