title: Alfentanil for conscious sedation during colonoscopy.
authors.forename: L A
authors.initials: LA
authors.lastname: Balaklaw
mesh_terms: D015760:Alfentanil; D000701:Analgesics, Opioid; D003113:Colonoscopy; D016292:Procedural Sedation / Q000379:methods*; D006801:Humans; D012107:Research Design
chemical_list: D000701:Analgesics, Opioid; D015760:Alfentanil