1. Center for Sleep Medicine, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
2. Department of Neurology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
3. Olmsted Medical Center, Rochester, Minnesota
4. Division of Pulmonary Critical Care, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
5. Department of Medicine, Mayo Clinic College of Medicine and Science, Rochester, Minnesota
6. Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota