Lumbar Degenerative Disease

• Xuanwu hospital, Capital Medical University — Beijing, Beijing Municipality, China
• Beijing Friendship Hospital of Capital Medical University — Beijing, China
• Department of Orthopedics, the Seventh Mecical Center of PLA General Hospital — Beijing, China
• Peking University First Hospital — Beijing, China

• Copernicus Memorial Hospital in Łódź, Poland — Lodz, Łódź Voivodeship, Poland

• Mater Misericordiae University Hospital — Dublin, Leinster, Ireland

• The First Affiliated Hospital of Shandong First Medical University — Jinan, Shandong, China

• University at Buffalo Neurosurgery — Buffalo, New York, United States

• Hao-Xuan Zhang — Jinan, Shandong, China
• The First Affiliated Hospital of Shandong First Medical University — Jinan, Shandong, China

Not specified

• Queen Savang Nadhana Memorial Hospital — Chon Buri, Thailand

Not specified

• Consorcio Hospital General Universitario de Valencia — Valencia, Spain