1. K. Schwarz and C. R. Bartram, Section of Molecular Biology and Department of Pediatrics II, University of Ulm, D-89070 Ulm, Germany.
2. G. H. Gauss and M. R. Lieber, Department of Pathology, School of Medicine, Washington University, St. Louis, MO 63110, USA.
3. L. Ludwig, Department of Internal Medicine I, University of Ulm, D-89070 Ulm, Germany.
4. U. Pannicke, D. Lindner, T. E. Hansen-Hagge, Section of Molecular Biology, University of Ulm, D-89070 Ulm, Germany.
5. Z. Li and S. Desiderio, Department of Molecular Biology and Genetics and Howard Hughes Medical Institute, School of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA.
6. W. Friedrich, Department of Pediatrics II, University of Ulm, D-89070 Ulm, Germany.
7. R. A. Seger, University Children's Hospital, University of Zürich, Zürich, Switzerland.