1. Hennepin County Medical Center, Minneapolis, MN
2. University of Minnesota, Minneapolis, MN
3. University of Vermont, Burlington, VT
4. Mayo Clinic, Rochester, MN
5. Hospital Mutua de Terrassa Departamento Medicina Interna, Hospital Mutua de Terrassa, Barcelona, Spain
6. SUNY Downstate Medical Center, Brooklyn, NY
7. First Department of Internal Medicine, University of Cologne, Cologne, Germany
8. Chelsea and Westminster Hospital, London, United Kingdom
9. Monash Infectious Diseases, Melbourne, Australia
10. University of Pittsburgh, Pittsburgh, PA