title: T-lymphocyte subpopulations in homosexual men.
mesh_terms: D000328:Adult; D006716:Homosexuality; D006801:Humans; D007108:Immune Tolerance; D007958:Leukocyte Count; D008297:Male; D009573:Nitrites / Q000009:adverse effects; D012725:Sexual Behavior; D019966:Substance-Related Disorders; D013601:T-Lymphocytes; D050378:T-Lymphocytes, Regulatory
chemical_list: D009573:Nitrites