1. Section of Sleep Surgery, Department of Otolaryngology – Head and Neck Surgery Rush University Medical Center Chicago Illinois U.S.A.
2. Section of Sleep Medicine, Department of Pulmonary, Critical Care and Sleep Medicine Rush University Medical Center Chicago Illinois U.S.A.
3. Division of Sleep Surgery, Department of Otorhinolaryngology – Head and Neck Surgery Perelman School of Medicine, University of Pennsylvania Philadelphia Pennsylvania U.S.A.
4. University of Pennsylvania, Perelman School of Medicine Philadelphia Pennsylvania U.S.A.
5. Department of Radiology University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania U.S.A.
6. Division of Sleep Medicine, Department of Medicine University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania U.S.A.