RT Journal Article SR Electronic T1 Guidelines on ethical and legal considerations in anonymous unlinked HIV seroprevalence research. Federal Centre for AIDS Working Group on anonymous unlinked HIV seroprevalence JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 625 OP 627 VO 143 IS 7 YR 1990 UL http://www.cmaj.ca/content/143/7/625.abstract