RT Journal Article SR Electronic T1 Koplik spots revisited JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 600 OP 600 DO 10.1503/cmaj.141656 VO 187 IS 8 A1 Sheela Xavier A1 Sarah E.D. Forgie YR 2015 UL http://www.cmaj.ca/content/187/8/600.abstract