RT Journal Article SR Electronic T1 Educators propose “flipping” medical training JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E625 OP E626 DO 10.1503/cmaj.109-4212 VO 184 IS 12 A1 Lauren Vogel YR 2012 UL http://www.cmaj.ca/content/184/12/E625.abstract