http://www.captaincolon.com/
http://www.captaincolon.com/testimonials.html

"I am very well acquainted with the colon's functions, and my true belief is that colon hydrotherapy is the perfect cleansing medium for preparing a patient for colonoscopy. Without any reservation, I declare that my wish is to see it become an established procedure for many kinds of gastrointestinal problems."

Dr. Leonard Smith, MD Gastrointestinal Surgeon

http://www.captaincolon.com/Colon_FAQ.html