title: The authors reply.
authors.affiliation: Department of Medicine, Division of Hospital Medicine, University of California, San Francisco, CA; Department of Medicine, Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University School of Medicine, Nashville, TN, Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, TN; Department of Medicine, Division of Pulmonary and Critical Care, University of California, San Francisco, CA, and Departments of Medicine and Anesthesia, Cardiovascular Research Institute, University of California, San Francisco, CA; Department of Medicine, Division of Pulmonary and Critical Care, University of California, San Francisco, CA, Departments of Medicine and Anesthesia, Cardiovascular Research Institute, University of California, San Francisco, CA.
authors.forename: Kirsten Neudoerffer
authors.initials: KN
authors.lastname: Kangelaris
authors.forename: Lorraine B
authors.initials: LB
authors.lastname: Ware
authors.forename: Michael A
authors.initials: MA
authors.lastname: Matthay
authors.forename: Carolyn S
authors.initials: CS
authors.lastname: Calfee