Department of Physical Therapy, Allen College, Waterloo, Iowa (Dr Liu); Department of Physical Therapy, University of North Texas Health Science Center, Fort Worth (Dr Nichols); Department of Acupuncture & Rehabilitation, Yue Yang Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai, China (Dr Zhang).

Correspondence: Hao (Howe) Liu, PT, PhD, MS, FGSA, Department of Physical Therapy, Allen College, Waterloo, IA 50703 ([email protected]).

The authors have disclosed that they have no significant relationships with, or financial interest in, any commercial companies pertaining to this article.