1. Colonoscopy. Web-site information. The National Digestive Diseases Information Clearinghouse (NDDIC) is a service of the NIDDK; 2007. Availabe at: http://www.cancer.gov/cancertopics/types/colon-and-rectal. Accessed January 23, 2008.
2. Health quality organization criticizes colonoscopies given without pain medication;Levenson;Rep Med Guidel Outcomes Res,2001
3. Unsedated endoscopy: you don't get a medal for it!;Leo;South Med J,2004
4. Who is willing to undergo endoscopy without sedation: patients, nurses, or the physicians?;Madan;South Med J,2004
5. Selective sedation for colonoscopy;Seow-Choen;Gastrointest Endosc,1994