1. Centre for Heart, Lung and Vascular Health School of Health and Exercise Sciences University of British Columbia, Okanagan Kelowna Canada
2. Cerebral Haemodynamics in Ageing and Stroke Medicine (CHiASM) Research Group NIHR Leicester Biomedical Research Centre University of Leicester Leicester UK
3. Pulmonary, Critical Care and Sleep Medicine Division University of Washington, and VA Puget Sound Healthcare System Seattle WA USA