1. Program on Integrative Medicine, Department of Physical Medicine and Rehabilitation, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
2. Department of Physical Medicine and Rehabilitation, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
3. Department of Family Medicine and Community Health, University of Massachusetts Medical School, Worcester, MA, USA.
4. School of Nursing, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
5. Center for Health Promotion and Disease Prevention, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.