1. University of Illinois at Chicago College of Nursing, Chicago, Illinois
2. Henry Ford Hospital Sleep Disorders and Research Center, Detroit, Michigan
3. Somni Bene Institut für Medizinische Forschung und Schlafmedizin Schwerin GmbH, Schwerin, Germany
4. Medical Center, University of Rostock, Rostock, Germany
5. Advanced Respiratory and Sleep Medicine, PLLC, Huntersville, North Carolina
6. CTI Clinical Research Center, Cincinnati, Ohio
7. Pacific Research Network, Evolution Research Group, LLC, San Diego, California
8. Sleep Therapy & Research Center, San Antonio, Texas
9. FutureSearch Trials of Neurology LP, Austin, Texas
10. Jazz Pharmaceuticals, Palo Alto, California
11. University of Arkansas for Medical Sciences, Little Rock, Arkansas
12. Stanford Center for Sleep Sciences and Medicine, Palo Alto, California
13. SleepMed, Inc., Columbia, South Carolina; and
14. University of South Carolina School of Medicine, Columbia, South Carolina