RT Journal Article SR Electronic T1 Invasive group A streptococcal infections JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 32 OP 32 DO 10.1503/cmaj.060241 VO 175 IS 1 A1 Erica Weir A1 Cheryl Main YR 2006 UL http://www.cmaj.ca/content/175/1/32.abstract