Hayee, Bu'Hussain Midazolam with meperidine or fentanyl for colonoscopy: results of a randomized trial. [electronic resource] - Gastrointestinal endoscopy Mar 2009 - 681-7 p. digital Publication Type: Comparative Study; Journal Article; Randomized Controlled Trial ISSN: 1097-6779 Standard No.: 10.1016/j.gie.2008.09.033 doi Subjects--Topical Terms: Analgesics, Opioid--administration & dosageColonoscopyConscious SedationDouble-Blind MethodDrug Therapy, CombinationFemaleFentanyl--administration & dosageHumansHypnotics and Sedatives--administration & dosageMaleMeperidine--administration & dosageMidazolam--administration & dosageMiddle Aged