RT Journal Article SR Electronic T1 Trainee fatigue: Are new limits on work hours enough? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 975 OP 976 DO 10.1503/cmaj.1031613 VO 170 IS 6 A1 Howard, Steven K. A1 Gaba, David M. YR 2004 UL http://www.cmaj.ca/content/170/6/975.abstract