[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