1. School of Nursing, Byrdine F. Lewis College of Nursing and Health Professions, Georgia State University, Atlanta, GA 30303, USA
2. Department of Respiratory Therapy, Byrdine F. Lewis College of Nursing and Health Professions, Georgia State University, Atlanta, GA 30303, USA
3. Department of Computer Science, School of Engineering, Vanderbilt University, Nashville, TN 37235, USA
4. School of Gerontology and Long-Term Care, Taipei Medical University, Taipei 11031, Taiwan