1. Baxter Healthcare Corporation, Deerfield, Illinois.
2. Robert-Bosch Hospital, Stuttgart, Germany.
3. University Hospital Essen, Essen, Germany.
4. Catholic University of the Sacred Heart, Rome, Italy.
5. University of Washington, Seattle, Washington.
6. Cleveland Clinic, Cleveland, Ohio.
7. Xcenda, Palm Harbor, Florida.
8. Consultant, Montreal, Canada.