RT Journal Article SR Electronic T1 Fecal chymotrypsin and trypsin determinations JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 691 OP 694 VO 104 IS 8 A1 J. S. Smith A1 I. Ediss A1 M. A. Mullinger A1 A. Bogoch YR 1971 UL http://www.cmaj.ca/content/104/8/691.abstract