[1] Faculty of Medical Sciences,Department of Orthopaedics and Rehabilitation Medicine
[2] Fukui University,Department of Orthopedic Surgery
[3] Sir Run Run Shaw Hospital,Servicio de Neurocirugia
[4] Zhejiang University School of Medicine,Department of Spinal Surgery
[5] Hospital Nacional Rosales,undefined
[6] Universidad de El Salvador,undefined
[7] The First Affiliated Hospital,undefined
[8] Sun Yat-Sen University School of Medicine,undefined