1. TM Steffen, PT, PhD, is Director, Program in Physical Therapy, Concordia University Wisconsin, 12800 N Lake Shore Dr, Mequon, WI 53097 (USA).
2. TA Hacker, PhD, is Assistant Scientist, University of Wisconsin Medical School, Cardiology Section, University of Wisconsin–Madison, Madison, Wis
3. L Mollinger, PT, MS, is Assistant Professor, Concordia University Wisconsin