title: Introduction and historical perspective.
authors.affiliation: Department of Obstetrics and Gynecology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA. rjw32@drexel.edu
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Wapner
authors.forename: Thaddeus
authors.initials: T
authors.lastname: Waters
mesh_terms: D001623:Betamethasone / Q000627:therapeutic use*; D003907:Dexamethasone / Q000627:therapeutic use*; D005260:Female; D005938:Glucocorticoids / Q000627:therapeutic use*; D049673:History, 20th Century; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature / Q000502:physiology; D008168:Lung / Q000196:embryology; D011247:Pregnancy; D011295:Prenatal Care / Q000266:history / Q000379:methods*; D012127:Respiratory Distress Syndrome, Newborn / Q000196:embryology / Q000517:prevention & control*
chemical_list: D005938:Glucocorticoids; D003907:Dexamethasone; D001623:Betamethasone