Symposium participants: Guido Adler* Ulm, Germany; Rudolf W. Ammann** Zurich, Switzerland; Simmy Bank, New York, NY, U.S.A.; Peter Banks, Boston, MA, U.S.A.; Hans Beger, Ulm, Germany; Christoph Beglinger** Basel, Switzerland; Daniel Bimmler, Zurich, Switzerland; Dale E. Bockman, Atlanta, GA, U.S.A.; Philipp C. Bornman, Cape Town, South Africa; Edward L. Bradley III* Buffalo, NY, U.S.A.; Markus Buechler, Bern, Switzerland; Meinhard Classen, Munich, Germany; Eugene P. DiMagno* Rochester, MN, U.S.A.; Ulrich R. Foelsch* Kiel, Germany; Alan K. Foulis, Glasgow, Scotland; Charles Frey* Sacramento, CA, U.S.A.; Michael Fried** Zurich, Switzerland; Harald Goebell* Essen, Germany; Fred S. Gorelick, West Haven, CT, U.S.A.; James H. Grendell* New York, NY, U.S.A.; Lucio Gullo, Bologna, Italy; Niklaus Gyr** Basel, Switzerland; Hideo Harada, Okayama, Japan; Philipp U. Heitz** Zurich, Switzerland; Jan B. M. J. Jansen, Nijmegen, The Netherlands; Ingemar Ihse* Lund, Sweden; Günter Klöppel** Kiel, Germany; Günter Krejs, Graz, Austria; Peter Malfertheiner, Magdeburg, Germany; Solly I. N. Marks, Cape Town, South Africa; Joachim Mössner* Leipzig, Germany; Claus Niederau, Dusseldorf, Germany; Howard A. Reber, Los Angeles, CA, U.S.A.; Henri Sarles, Marseille, France; Martin Sarner, London, England; Manfred V. Singer* Mannheim, Germany; Michael Steer, Boston, MA, U.S.A.; Helge Worning, Copenhagen, Denmark. *Moderators of the group sessions. **Members of the organizing committee.