Effects of alfentanil or fentanyl added to propofol for sedation in colonoscopy on cognitive functions: Randomized controlled trial
Güler Doğanay, Perihan Ekmekçi, Baturay Kansu Kazbek, Hakan Yılmaz, Gülbanu Erkan, Filiz Tüzüner
(Turk J Gastroenterol 2017; 28: 453-459) DOI: 10.5152/tjg.2017.16489