title: Trace anesthetic gases: an unproven health hazard.
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology; D000776:Anesthesiology; D000777:Anesthetics; D005260:Female; D005740:Gases; D006801:Humans; D009784:Occupational Diseases / Q000139:chemically induced / Q000453:epidemiology*; D011247:Pregnancy; D014481:United States
chemical_list: D000777:Anesthetics; D005740:Gases