1. Department of Internal Medicine, Division of Infectious Diseases, University of Nebraska Medical Center, Omaha
2. Division of Pulmonary and Critical Care Medicine, University of Connecticut School of Medicine, Farmington
3. Brigham and Women's Hospital and Harvard Medical School
4. Harvard Pilgrim Health Care Institute, Boston, Massachusetts
5. Department of Medicine, Critical Care Program, Queens University, Kingston, Ontario, Canada
6. Division of Pulmonary, Critical Care and Sleep Medicine, University of California, San Diego
7. Department of Medicine, Division of Pulmonary Critical Care and Sleep Medicine, State University of New York at Stony Brook
8. Department of Surgery, Division of Trauma, Critical Care and Emergency Surgery, University of Michigan, Ann Arbor
9. Department of Critical Care Medicine, National Institutes of Health, Bethesda
10. Johns Hopkins University School of Medicine, Baltimore, Maryland
11. Department of Infectious Diseases, Hospital Universitari de Bellvitge, Bellvitge Biomedical Research Institute, Spanish Network for Research in Infectious Diseases, University of Barcelona, Spain
12. Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University at Buffalo, Veterans Affairs Western New York Healthcare System, New York
13. Thoraxzentrum Ruhrgebiet, Department of Respiratory and Infectious Diseases, EVK Herne and Augusta-Kranken-Anstalt Bochum, Germany
14. Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha
15. Summa Health System, Akron, Ohio
16. Department of Medicine, Division of Pulmonary and Critical Care Medicine, South Texas Veterans Health Care System and University of Texas Health Science Center at San Antonio
17. Burns, Trauma and Critical Care Research Centre, The University of Queensland
18. Royal Brisbane and Women's Hospital, Queensland
19. School of Medicine and Pharmacology, University of Western Australia, Perth, Australia
20. Library and Knowledge Services, National Jewish Health, Denver, Colorado
21. Department of Clinical Epidemiology and Biostatistics and Department of Medicine, McMaster University, Hamilton, Ontario, Canada