[1] Govt Med Coll, Dept Orthopaed, Karur 639004, India
[2] Orthopaed Res Grp, Dept Spine Surg, Coimbatore, Tamil Nadu, India
[3] Karpagam Acad Higher Educ, Dept Biotechnol, Coimbatore, Tamil Nadu, India
[4] Govt Med Coll, Dept Orthopaed, Omandurar Govt Estate, Chennai, Tamil Nadu, India
[5] Dr MGR Educ & Res Inst, ACS Med Coll & Hosp, Dept Orthopaed, Chennai, Tamil Nadu, India
[6] Weill Cornell Med, Dept Neurosurg Spine, New York, NY USA
[7] RMIT Univ, Sch Engn, Dept Biomed Engn, Melbourne, Vic, Australia
[8] Icahn Sch Med Mt Sinai, Dept Orthoped Surg, New York, NY 10029 USA
[9] Fdn Policlin Univ Agostino Gemelli, Dept Spine Surg, IRCCS, Rome, Italy
[10] Univ Connecticut, Ctr Hlth, Dept Orthopaed Surg, Brain & Spine Inst, Farmington, CT USA
[11] Virginia Mason Med Ctr, Ctr Neurosci & Spine, Seattle, WA 98101 USA
[12] Royal Infirm Edinburgh NHS Trust, Dept Neurosurg, Edinburgh Spinal Surg Outcome Studies Grp, Edinburgh, Midlothian, Scotland
[13] Univ Southern Calif, USC Spine Ctr, Keck Sch Med, Dept Neurol Surg & Orthopaed, Los Angeles, CA USA
[14] Univ Hosp Ctr Sestre Milosrdnice, Spinal Surg Div, Dept Traumatol, Zagreb, Croatia
[15] Univ Appl Hlth Sci, Dept Anat & Physiol, Zagreb, Croatia
[16] AO Fdn, Res Dept, AO Spine, Davos, Switzerland
[17] Capital Med Univ, Xuanwu Hosp, Dept Orthopaed, Beijing, Peoples R China
[18] UC Davis Med Ctr, Dept Orthopaed Spine Surg, Sacramento, CA USA
[19] Univ Campus Biomed Roma, Depaertimental Fac Med & Surg, Reaserch Unit Orthopaed & Trauma Surg, Rome, Italy
[20] Fdn Policlin Univ Campus Biomed, Operat Reaserch Unit Orthopaed & Traumatol, Rome, Italy
[21] Cairo Univ, Res & Teaching Hosp, Kasr Alainy Fac Med, Dept Neurosurg, Cairo, Egypt
[22] Secur Forces Hosp Dammam, Dept Neurosurg, Dammam, Saudi Arabia
[23] Gerling Inst, NY Orthoped, Brooklyn, NY USA
[24] NYU Grossman Sch Med, Dept Orthoped Surg, New York, NY USA
[25] BG Klinikum Bergmannstrost Halle, Dept Neurosurg, Halle, Germany
[26] Emory Univ, Dept Orthopaed, Atlanta, GA 30322 USA
[27] Johns Hopkins Univ, Dept Orthopaed Surg, Baltimore, MD USA
[28] AO Fdn, AO Network Clin Res, AO Spine, Davos, Switzerland