1. School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom;
2. Multidisciplinary Cardiovascular Research Centre, University of Leeds, Leeds, United Kingdom;
3. Heart Centre, University of Leipzig, Leipzig, Germany;
4. Neurosciences Intensive Care Unit, Wessex Neurological Centre, University Hospital Southampton, Southampton, United Kingdom; and
5. Rehabilitation Clinical Trials Center, Division of Respiratory and Critical Care Physiology and Medicine, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California