1. Loyola University Medical Center, Maywood, Illinois
2. Stanford University School of Medicine, Stanford, California
3. Cleveland Clinic Foundation, Cleveland, Ohio
4. William Beaumont Hospital, Royal Oak, Michigan
5. The University of Michigan Medical Center, Ann Arbor, Michigan
6. Rehabilitation Institute of Chicago, Chicago, Illinois
7. Massage Therapy of Oak Park, Oak Park, Illinois
8. University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania
9. National Institutes of Health, Bethesda, Maryland