1. Centre for Heart, Lung, and Vascular Health; School of Health and Exercise Science; University of British Columbia; Kelowna Canada
2. School of Kinesiology; University of British Columbia; Vancouver Canada
3. Department of Ophthalmology and Visual Sciences; Faculty of Medicine; University of British Columbia; Vancouver Canada
4. Diagnostic and Therapeutic Neuroradiology; Vancouver General Hospital; University of British Columbia; Vancouver Canada
5. Division of Neurosurgery; Department of Clinical Neurosciences; University of Cambridge; Cambridge UK
6. Department of Radiology; UBC MRI Research Centre; University of British Columbia; Vancouver Canada