RT Journal Article SR Electronic T1 To mandatory nap or not to mandatory nap JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E151 OP E152 DO 10.1503/cmaj.109-3146 VO 182 IS 3 A1 Doyle, Sabrina YR 2010 UL http://www.cmaj.ca/content/182/3/E151.abstract