RT Journal Article SR Electronic T1 Effect of papain on experimental E. coli infection: a preliminary report JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 68 OP 71 VO 99 IS 2 A1 J. R. Martin A1 J. De Vries A1 S. Moore YR 1968 UL http://www.cmaj.ca/content/99/2/68.abstract