RT Journal Article SR Electronic T1 tPA for acute stroke: balancing baseline imbalances JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1652 OP 1653 VO 166 IS 13 A1 David Gladstone A1 Michael Hill A1 Sandra Black YR 2002 UL http://www.cmaj.ca/content/166/13/1652.abstract