RT Journal Article SR Electronic T1 Electronic control devices JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 342 OP 343 DO 10.1503/cmaj.1080079 VO 179 IS 4 A1 Mark W. Kroll, PhD A1 Hugh Calkins MD A1 Richard M. Luceri MD A1 Michael A. Graham MD A1 William G. Heegaard, MD MPH YR 2008 UL http://www.cmaj.ca/content/179/4/342.3.abstract