Malatack J J, Altman H A, Nard J A, Wiener E S, Urbach A H, McGregor R S
Department of Pediatrics, Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pennsylvania.
J Pediatr. 1989 Jan;114(1):101-4. doi: 10.1016/s0022-3476(89)80613-4.