RT Journal Article SR Electronic T1 The thinker's sign JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 611 OP 611 DO 10.1503/cmaj.070672 VO 179 IS 6 A1 Gabriel Rebick MD A1 Suzanne Morin, MD MSc YR 2008 UL http://www.cmaj.ca/content/179/6/611.abstract