1 University of Southern California Keck School of Medicine, Los Angeles County Medical Center, 12401 Washington Blvd, Whittier, CA, 90602, USA. rison@usc.edu.
2 PIH Health Hospital-Whittier Stroke Center, PIH Health Hospital Non-Invasive Vascular Laboratory, 12401 Washington Blvd, Whittier, CA, 90602, USA. rison@usc.edu.
3 JKS Science & Medical Writing, Los Angeles, CA, USA.
4 Faculty of Medicine, Nursing and Health Sciences, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia.
5 Department of Family & Community Medicine, University of Toronto, 500 University Avenue, Toronto, M5G 1V7, Canada.