title: AHA protests OSHA action on nitrous oxide level.
mesh_terms: D004781:Environmental Exposure; D005161:Facility Regulation and Control; D006077:Government Agencies; D006801:Humans; D008452:Maximum Allowable Concentration; D009609:Nitrous Oxide / Q000009:adverse effects*; D009784:Occupational Diseases / Q000517:prevention & control; D010564:Personnel, Hospital; D014481:United States
chemical_list: D009609:Nitrous Oxide