title: T-cell ratios in New York City prostitutes.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000453:epidemiology / Q000276:immunology*; D008875:Middle Aged; D009519:New York City; D011477:Sex Work; D012725:Sexual Behavior; D013601:T-Lymphocytes / Q000276:immunology*