title: In honor of Dr. Joseph Butterfield.
authors.affiliation: Department of Neonatology, University of Illinois, Chicago Medical Center, USA.
authors.forename: D
authors.initials: D
authors.lastname: Vidyasagr
mesh_terms: D049673:History, 20th Century; D009359:Neonatology / Q000266:history; D010500:Perinatology / Q000266:history; D014481:United States