1. University of Washington, Seattle, WA
2. MetroHealth Medical Center and Case Western Reserve University, Cleveland, OH
3. John D. Dingell VA Medical Center and Wayne State University, Detroit, MI
4. Bothwell Regional Health Center, Sedalia, MO
5. Cleveland Clinic, Cleveland, OH
6. Mayo Clinic, Rochester, MN
7. American Academy of Sleep Medicine, Darien, IL