RT Journal Article SR Electronic T1 How the gut expels parasites: new clues JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 27 OP 27 DO 10.1503/cmaj.050684 VO 173 IS 1 A1 Secko, David YR 2005 UL http://www.cmaj.ca/content/173/1/27.abstract