title: Sex statistics unreliable.
authors: C B
authors: CB
authors: Goodhart
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control*; D001699:Biometry; D005260:Female; D006801:Humans; D008297:Male; D012725:Sexual Behavior; D011795:Surveys and Questionnaires; D006113:United Kingdom