RT Journal Article SR Electronic T1 Pneumoperitoneum in the newborn JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 201 OP 204 VO 95 IS 5 A1 Mestel, A. L. A1 Trusler, G. A. A1 Humphreys, R. P. A1 Simpson, J. S. YR 1966 UL http://www.cmaj.ca/content/95/5/201.abstract