1. Department of Physical Therapy, Long Island University, Brooklyn Campus, One University Plaza, Brooklyn, NY 10021, USA
2. Department of Epidemiology, West Virginia University School of Public Health, Morgantown, WV 26506-9190, USA
3. Center for the Study of Complementary and Alternative Therapies, University of Virginia Health System, Charlottesville, VA 22908-0782, USA
4. Department of Physical Medicine and Rehabilitation, Center for the Study of Complementary and Alternative Therapies, University of Virginia Health System, Charlottesville, VA 22908-0782, USA