9Carlsson U, Grattidge P. Sedation for upper gastroimestinal endoscopy: a comparative study of propofol and midazolam. Endoscopy, 1995; 27: 240~243.
10Bcrggen L, Eriksson I, Mollenholt , et al. Sedation for fibreoptic gastroscopy: A comparative study of midazolam and diazepam. Br J Anaesth, 1983; 55:289.