Nitrous oxide and vitamin B12.
D000749:Anemia, Megaloblastic / Q000139:chemically induced; D000769:Anesthesia, Inhalation / Q000009:adverse effects; D000818:Animals; D006801:Humans; D009609:Nitrous Oxide / Q000009:adverse effects / Q000378:metabolism*; D051381:Rats; D013997:Time Factors; D014805:Vitamin B 12 / Q000378:metabolism*
D009609:Nitrous Oxide; D014805:Vitamin B 12