RT Journal Article SR Electronic T1 HIV testing and counselling: improving quality of care through science and experience JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 149 OP 152 VO 149 IS 2 A1 D. J. Walters A1 M. Toombs YR 1993 UL http://www.cmaj.ca/content/149/2/149.abstract