GÜLER DOĞANAY; PERIHAN EKMEKÇI; BATURAY KANSU KAZBEK; HAKAN YILMAZ; GÜLBANU ERKAN; FILIZ TÜZÜNER. Effects of alfentanil or fentanyl added to propofol for sedation in colonoscopy on cognitive functions: Randomized controlled trial. Turkish Journal of Gastroenterology, [S. l.], v. 28, n. 6, p. 453–459, 2019. Disponível em: https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/3450. Acesso em: 6 jul. 2025.