[1
]
1 Section of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine,
Yale University School of Medicine, New Haven, Connecticut.
[2
]
2 Division of Critical Care, Pulmonary, and Sleep Medicine, University of Texas at
Houston, McGovern Medical School, Houston, Texas.
[3
]
3 Division of Pulmonary, Critical Care, and Sleep Medicine, University of California,
San Diego, La Jolla, California.
[4
]
4 Division of Pulmonary and Critical Care Medicine, University of North Carolina School
of Medicine, Chapel Hill, North Carolina.
[5
]
5 Division of Pulmonary, Critical Care, Allergy, and Sleep Medicine, Medical University
of South Carolina, Charleston, South Carolina.
[6
]
6 Division of Pulmonary and Critical Care, Department of Medicine, University of Connecticut,
Farmington, Connecticut.
[7
]
7 Department of Medicine, Boston University, Boston, Massachusetts; and.
[8
]
8 Division of Pulmonary and Critical Care Medicine, Department of Medicine, Mount
Auburn Hospital, Harvard Medical School, Boston, Massachusetts.