Anaesthetic contamination.
D000433:1-Propanol; D000397:Air Pollution; D000776:Anesthesiology; D000777:Anesthetics; D006801:Humans; D009609:Nitrous Oxide; D009873:Operating Rooms; D000078329:Workforce
D000777:Anesthetics; D000433:1-Propanol; D009609:Nitrous Oxide