Intervertebral Disc Degeneration

• Priorov National Medical Research Center of Traumatology and Orthopedics — Moscow, Russia
• Institute of Cytology and Genetics — Novosibirsk, Russia
• Novosibirsk Research Institute of Traumatology and Orthopaedics n.a.Ya.L.Tsivyan — Novosibirsk, Russia

• University of Iowa Hospitals and Clinics — Iowa City, Iowa, United States

• Jordan Young Institute — Virginia Beach, Virginia, United States

Not specified

• Buda Health Center, Királyhágó u. 1-3. — Budapest, Hungary

• Hospital Clinico Universitario — Valladolid, Spain
• Instituto de Biologia y Genetica Molecular — Valladolid, Spain

• Long Beach Medical Center — Long Beach, California, United States
• Memorial Orthopaedic Surgical Group — Long Beach, California, United States
• Palm Beach Neurosurgery — Wellington, Florida, United States
• Orthopaedic Institute of Western Kentucky — Paducah, Kentucky, United States

• Taunton & Somerset NHS Foundation Trust of Musgrove Park Hospital — Taunton, Somerset, United Kingdom
• The Ipswich Hospital NHS Trust — Ipswich, Suffolk, United Kingdom
• Pain and Interventional Neuromodulation Research Group, Pain Management Dept, Seacroft Hospital, Leeds Teaching Hospitals NHS Trust — Leeds, West Yorkshire, United Kingdom
• The Dudley Group NHS Foundation Trust, Russell Hall Hospital — Birmingham, United Kingdom

• Katholisches Klinikum Koblenz — Koblenz, Germany

• Weill Cornell Brain and Spine Center — New York, United States