1. EM Frese, PT, MHS, CCS, is Associate Professor, Department of Physical Therapy, Edward and Margaret Doisy School of Allied Health Professions, Saint Louis University, 3437 Caroline St, St Louis, MO 63104 (USA).
2. RR Richter, PT, PhD, is Associate Professor, Department of Physical Therapy, Edward and Margaret Doisy School of Allied Health Professions, Saint Louis University
3. TV Burlis, PT, MHS, CCS, is Instructor, Program in Physical Therapy, Washington University School of Medicine, St Louis, Mo