1. Centre for Heart, Lung and Vascular Health School of Health and Exercise Sciences University of British Columbia Okanagan Kelowna BC V1V 1V7 Canada
2. Department of Anesthesiology, Pharmacology, and Therapeutics Vancouver General Hospital West 12th Avenue, University of British Columbia Vancouver BC V5Z 1M9 Canada
3. Department of Cellular and Physiological Sciences University of British Columbia Vancouver BC V6T 1Z4 Canada
4. Cerebral Haemodynamics in Ageing and Stroke Medicine (CHiASM) Research Group Leicester Biomedical Research Centre University of Leicester Leicester UK