1. Department of Medicine, University of Minnesota , Minneapolis, Minnesota , USA
2. Departments of Medicine and Medical Microbiology and Immunology, University of Wisconsin–Madison , Madison, Wisconsin , USA
3. Department of Pediatrics, The Ohio State University College of Medicine , Columbus, Ohio , USA
4. Department of Pediatrics, Children's Hospital of Orange County , Orange, California , USA
5. Departments of Medical Microbiology and Infectious Diseases, and Internal Medicine, CancerCare Manitoba and the University of Manitoba , Winnipeg , Canada
6. Department of Medicine, Wayne State University , Detroit, Michigan , USA
7. Centre of Infectious Diseases and Microbiology Laboratory Services, Institute of Clinical Pathology and Medical Research, Westmead Hospital and the University of Sydney , Sydney, New South Wales , Australia
8. Divisions of Infectious Diseases and Hematology Oncology, Massachusetts General Hospital, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School , Boston, Massachusetts , USA
9. University Health Network, University of Toronto , Toronto, Ontario , Canada
10. Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, Dana-Farber Cancer Institute, Harvard Medical School , Boston, Massachusetts , USA
11. Department of Medical Microbiology and Infection Control, Vancouver General Hospital, Vancouver, British Columbia, University of Montreal Research Center , Montreal, Quebec , Canada
12. Department of Medicine, University of Pittsburgh , Pittsburgh, Pennsylvania , USA
13. Department of Medicine, University of Texas Health Science Center at San Antonio , San Antonio, Texas , USA
14. Departments of Internal Medicine and Medical Microbiology and Immunology, University of California, Davis , Davis, California , USA
15. Department of Infectious Diseases, Monash University , Melbourne, Victoria , Australia
16. Department of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania , USA