1. Department of Integrative Physiology, Integrative Vascular Biology Laboratory; University of Colorado; Boulder CO USA
2. Faculty of Health and Social Development, Centre for Heart, Lung & Vascular Health; University of British Columbia; Kelowna BC Canada
3. Division of Critical Care Medicine and Department of Medicine; University of British Columbia; Vancouver BC Canada
4. Brain Physics Laboratory, Division of Academic Neurosurgery, Department of Clinical Neurosciences, Addenbrookes Hospital; University of Cambridge; Cambridge UK