title: Surfeit of boys could spread AIDS in China's cities.
authors.forename: David
authors.initials: D
authors.lastname: Cyranoski
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology*; D002681:China / Q000453:epidemiology; D002947:Cities / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008954:Models, Biological; D012744:Sex Ratio; D011477:Sex Work / Q000706:statistics & numerical data; D014504:Urban Health / Q000706:statistics & numerical data / Q000639:trends