1. Division of Pulmonary, Critical Care, and Sleep Medicine, University of Kentucky, Lexington
2. Department of Health and Exercise Science, Wake Forest University, Winston Salem, North Carolina
3. Section on Pulmonary, Critical Care, Allergy, and Immunologic Disease, Wake Forest University, Winston Salem, North Carolina
4. Department of Biostatistical Sciences, Wake Forest University, Winston Salem, North Carolina
5. Department of Neurology, Wake Forest University, Winston Salem, North Carolina
6. Physiotherapy Department, University of Melbourne, Melbourne, Australia
7. Francis Payne Bolton School of Nursing, Case Western Reserve University, Cleveland, Ohio
8. Department of Critical Care, Respiratory Institute, Cleveland Clinic, Cleveland, Ohio
9. Division of Geriatrics, Wake Forest University, Winston Salem, North Carolina