Two-dimensional head ultrasonography reference values for extra-axial fluid spaces in extremely preterm neonates

Paige M.. Nelson, University of Iowa Stead Family Children's Hospital, Iowa City, IA, United States; Allison Momany, University of Iowa Stead Family Children's Hospital, Iowa City, IA, United States; Heidi Harmon, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, IA, United States