1. Mayo Clinic College of Medicine, Rochester, MN
2. University of California, San Diego,CA
3. Dayton Department of Veterans Affairs Medical Center, Wright State University, and Kettering Medical Center, Dayton, OH
4. New Jersey Neuroscience Institute at JFK Medical Center, Edison, NJ
5. University of New Mexico School of Medicine, Albequerque, NM
6. Baylor College of Medicine & VAMC, Houston, TX
7. Wayne State University Medical School and VAMC, Detroit, MI
8. The School of Sleep Medicine, Inc., Palo Alto, CA
9. University of Manitoba, Winnipeg, Canada
10. University of Marburg, Marburg, Germany
11. Lankenau and Paoli Hospitals, Wynnewood, PA
12. University of Minnesota, Minneapolis, MN