1. Manchester Royal Infirmary, Manchester, U.K.
2. Stanford University Medical Centre, Stanford
3. HemoCleanse, West Lafayette, Indiana, U.S.A.
4. Veterans General Hospital, Taipei, Taiwan
5. Karolinska Institute, Huddinge, Sweden
6. Baxter Healthcare, McGaw Park, Illinois, U.S.A.
7. Holbæk County Hospital, Holbæk, Denmark
8. Moncrief Dialysis Center, Austin, Texas
9. University of Missouri, Columbia, Missouri
10. University of Pittsburgh Medical Centre, Pittsburgh, Pennsylvania, U.S.A.
11. Hôpital Lapeyronie, Montpellier, France
12. University Hospital, Umeå, Sweden
13. Toronto Western Hospital, Toronto, Ontario, Canada