Letter: Spasm and operative cholangiography.
D000769:Anesthesia, Inhalation; D002758:Cholangiography / Q000009:adverse effects* / Q000379:methods; D005283:Fentanyl / Q000009:adverse effects; D006801:Humans; D013035:Spasm / Q000139:chemically induced / Q000209:etiology*; D009803:Sphincter of Oddi / Q000187:drug effects
D005283:Fentanyl