[1] Staff Orthopaed Spine Surg Ctr Adv Spine Care Sou, Tucson, AZ USA
[2] Surg Inst Tucson, Tucson, AZ USA
[3] Fdn Univ Sanitas, Dept Orthopaed, Bogota, DC, Colombia
[4] Univ Fed Estado Rio de Janeiro, Hosp Univ Gaffre & Guinle, Dept Orthoped, Rio De Janeiro, Brazil
[5] Brown Univ, Rhode Isl Hosp, Dept Neurosurg, Warren Alpert Med Sch, Providence, RI 02912 USA
[6] Arabellaklin, Dept Orthoped Surg, Munich, Germany
[7] Clin Reina Sofia Clin Colsanitas, Ctr Columna Cirugia Minima Invas, Bogota, DC, Colombia
[8] Fdn Univ Sanitas Bogota, Bogota, DC, Colombia
[9] Fed Univ State Rio de Janeiro UNIRIO, Rio De Janeiro, Brazil
[10] Gaffre & Guinle Univ Hosp, Rio De Janeiro, Brazil
[11] Nanoori Hosp, Dept Neurosurg, Seoul, South Korea
[12] Minnesota Spine Inst, Roseville, MN USA
[13] Desert Inst Spine Care, Phoenix, AZ USA