Parad R B, Applegate K, Doubilet P M, Fishman S J, Estroff J A
Department of Newborn Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.
J Ultrasound Med. 1995 Feb;14(2):161-3. doi: 10.7863/jum.1995.14.2.161.