1. Heinrich-Pette-Institute, D-20251 Hamburg, Germany.
2. Hannover Medical School, D-30625 Hannover, Germany.
3. University Hospital Eppendorf, D-20249 Hamburg, Germany.
4. Albert-Ludwigs-Universität, D-79106 Freiburg, Germany.
5. EUFETS AG, D-55743 Idar-Oberstein, Germany.