[1] Rigshosp, Dept Med Gastroenterol, DK-2100 Copenhagen, Denmark
[2] Dept Gen Surg & Clin Nutr, Warsaw, Poland
[3] Hop Beaujon, Serv Gastroenterol & Assistance Nutr, Clichy, France
[4] Mt Sinai Med Ctr, New York, NY 10029 USA
[5] Vanderbilt Univ, Med Ctr, Nashville, TN USA
[6] Univ Pittsburgh, Med Ctr, Pittsburgh, PA USA
[7] UCL, London, England
[8] Nycomed GmbH, Constance, Germany
[9] NPS Pharmaceut, Bedminster, NJ USA