1. Rehabilitation Science, School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, USA
2. Department of Respiratory Therapy, College of Applied Medical Sciences, King Saud bin Abdul-Aziz University for Health Sciences, Riyadh, Saudi Arabia
3. Department of Physical Therapy, School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, USA
4. Department of Health Care Organization and Policy, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA