RT Journal Article SR Electronic T1 Fatigue and stress in medical students, interns and residents: it's time to act! JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 18 OP 19 VO 140 IS 1 A1 Squires, B. P. YR 1989 UL http://www.cmaj.ca/content/140/1/18.abstract