title: Two groups not on all fours.
authors.forename: Hugh
authors.initials: H
authors.lastname: Young
mesh_terms: D017954:Africa South of the Sahara / Q000453:epidemiology; D002944:Circumcision, Male; D015658:HIV Infections / Q000453:epidemiology* / Q000517:prevention & control; D015497:HIV-1; D006801:Humans; D015994:Incidence; D008297:Male; D011184:Postoperative Period; D012107:Research Design; D012725:Sexual Behavior