1. C. Winstein, PT, PhD, FAPTA, is a guest co-editor of this special series. She is Professor, Division of Biokinesiology and Physical Therapy, and Director, Motor Behavior and Neurorehabilitation Laboratory, Health Sciences Campus, University of Southern California, Los Angeles, California. She is a former PTJ Editorial Board member.
2. P. Requejo, PhD, is a guest co-editor of this special series. He is Director, Rehabilitation Engineering Department, and Associate Director, Pathokinesiology Laboratory, Rancho Los Amigos National Rehabilitation Center, Downey, California, and Adjunct Assistant Professor, Biomedical Engineering Department, University of Southern California.