[1] Indiana Univ, Sch Med, Indianapolis, IN USA
[2] Alamo Med Res, San Antonio, TX USA
[3] Mt Vernon Endoscopy Ctr, Alexandria, VA USA
[4] Univ Miami, Ctr Liver Dis, Miami, FL USA
[5] Baylor Coll Med, Houston, TX 77030 USA
[6] Indianapolis Gastroenterol Res Fdn, Indianapolis, IN USA
[7] S Florida Ctr Gastroenterol, Wellington, FL USA
[8] Liver Specialist Texas, Houston, TX USA
[9] Henry Ford Hosp, Detroit, MI 48202 USA
[10] Digest Dis Associates, Baltimore, MD USA
[11] Univ Calif Davis, Sacramento, CA 95817 USA
[12] Liver & Intestinal Res Ctr, Vancouver, BC, Canada
[13] Cornell Univ, Weill Med Coll, New York, NY 10021 USA
[14] Digest Healthcare Georgia, Atlanta, GA USA
[15] Schering Plough Res Inst, Kenilworth, NJ USA