Chronic Pain

• Sleep D/O Center of Alabama — Birmingham, Alabama, United States
• Arkansas Center for Sleep Medicine — Little Rock, Arkansas, United States
• NeuroTrials Research Inc. — Atlanta, Georgia, United States
• Clayton Sleep Institute — St Louis, Missouri, United States

• Aarhus University Hospital — Aarhus C, Denmark

• Tufts Medical Center — Boston, Massachusetts, United States

• Icahn School of Medcine at Mount Sinai — New York, United States

• Danish Pain Research Center, Aarhus University Hospital — Aarhus, Denmark

• Vrije Universiteit Brussel — Brussels, Belgium

• Assiut University — Asyut, Egypt

• Hospital Municipal de Badalona — Badalona, Barcelona, Spain
• Hospital Universitari Germans Trias i Pujol — Badalona, Barcelona, Spain
• Hospital del Mar — Barcelona, Spain
• Hospital de l'Esperança — Barcelona, Spain

• Center for Translational Imaging, Northwestern University — Chicago, Illinois, United States

Not specified