RT Journal Article SR Electronic T1 US children's study escapes knife JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1694 OP 1694 DO 10.1503/cmaj.070552 VO 176 IS 12 A1 Janet Rae Brooks YR 2007 UL http://www.cmaj.ca/content/176/12/1694.abstract