title: [Intraoperative changes in plasma folate and cobalamin levels in patients inhaling nitrous oxide].
mesh_terms: D000328:Adult; D000395:Air Pollutants, Occupational / Q000009:adverse effects; D004781:Environmental Exposure; D005492:Folic Acid / Q000097:blood*; D006801:Humans; D008875:Middle Aged; D009609:Nitrous Oxide / Q000009:adverse effects*; D009873:Operating Rooms; D013997:Time Factors; D014805:Vitamin B 12 / Q000097:blood*
chemical_list: D000395:Air Pollutants, Occupational; D005492:Folic Acid; D009609:Nitrous Oxide; D014805:Vitamin B 12