Dyssomnias

• University of Colorado Anschutz Medical Campus — Aurora, Colorado, United States

• Clinique Saint-Luc de Bouge — Bouge, Namur, Belgium

• Hospital de Clinicas de Porto Alegre — Porto Alegre, Rio Grande do Sul, Brazil

Not specified

• Papworth Hospital — Cambridge, United Kingdom

• Pacific Research Network — San Diego, California, United States
• MD Clinical — Hallandale, Florida, United States
• Miami research Associates — South Miami, Florida, United States
• Sleep Disorders Centers of Georgia — Atlanta, Georgia, United States

• University of Ottawa Heart Institute — Ottawa, Ontario, Canada

• Hospital of the University of Pennsylvania — Philadelphia, Pennsylvania, United States

• Sleep Disorders Research Program Brigham and Women's Hospital — Boston, Massachusetts, United States

• Assiut University hospital — Asyut, Asyut Governorate, Egypt