Risus sardonicus and laughing gas--when nitrous oxide lost its innocence.
Sund Kristensen
H
H
Department of Infectious Diseases, Blegdam Hospital, University of Copenhagen, Denmark.
Berthelsen
P G
PG
D000769:Anesthesia, Inhalation / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009609:Nitrous Oxide / Q000009:adverse effects / Q000266:history*
D009609:Nitrous Oxide