1. ARUP Laboratories, Salt Lake City, Utah
2. Duke University Medical Center
3. Veterans Administration Medical Center, Durham, North Carolina
4. Hospital Clinic Institut d'Investigacions Biomediques August Pi i Sunyer-University of Barcelona, Barcelona, Spain
5. Quintiles Transnational -
6. University Medical Center of Besançon, Besançon France
7. Hospital General Universitario Gregorio Maranon, Madrid, Spain
8. Second University of Naples, Naples, Italy
9. Attikon University General Hospital, Athens, Greece
10. CHU Nancy-Brabois, Nancy, France
11. Veterans Administration Medical Center, Ann Arbor, Michigan
12. University Hospital for Infectious Diseases, Zagreb, Croatia
13. South Eastern Sydney and Illawarra Area Health Service, Wollongong, Australia
14. Flinders Medical Centre, Adelaide, Australia
15. The University of New South Wales, Sydney, Australia
16. Southern Health, Clayton, Australia
17. Medical University of South Carolina, Charleston, South Carolina
18. Auckland City Hospital, Auckland, New Zealand
19. Middlemore Hospital, Auckland, New Zealand
20. University of Otago, Christchurch, New Zealand
21. Departments of Pathology and Medicine, University of Utah School of Medicine, Salt Lake City, Utah