1. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
2. Outcomes After Critical Illness and Surgery Group, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
3. Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
4. Department of Physical Therapy, Concordia University, St. Paul, Minnesota, United States
5. School of Health Sciences, University of Dundee, Dundee, Scotland