RT Journal Article SR Electronic T1 Reversible retiform purpura: a sign of cocaine use JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E597 OP E600 DO 10.1503/cmaj.101005 VO 183 IS 9 A1 Christina Han A1 Gayatri Sreenivasan A1 Jan P. Dutz YR 2011 UL http://www.cmaj.ca/content/183/9/E597.abstract