[1] Rigshosp, Juliane Marie Ctr 4074, Sect Surg Pathophysiol, DK-2100 Copenhagen, Denmark
[2] Univ Heidelberg, Dept Surg, D-6900 Heidelberg, Germany
[3] Univ So Calif, Dept Surg, Los Angeles, CA USA
[4] NW Colon & Rectal Clin, Seattle, WA USA
[5] GlaxoSmithKline R&D, GI Clin Dev, Greenford, Middx, England