RT Journal Article SR Electronic T1 Pressure mounts to expand screening of US newborns JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 22 OP 22 DO 10.1503/cmaj.050712 VO 173 IS 1 A1 Guthrie, Patricia YR 2005 UL http://www.cmaj.ca/content/173/1/22.abstract