[1] Tzaneio Gen Hosp Piraeus, Dept Orthopaed & Traumatol, 1 Afendouli & Tzanni, Piraeus 18536, Greece
[2] Univ Brescia, Dept Clin & Expt Sci, Phys & Rehabil Med, Brescia, Italy
[3] Polytech Montreal, Dept Mech Engn, Montreal, PQ, Canada
[4] St Justine Univ Hosp Ctr, Montreal, PQ, Canada
[5] Childrens Hosp Bambino Gest, Inst Sci Res, Orthopaed Dept, Rome, Italy
[6] Clin Parc, Dept Orthoped Med, Lyon, France
[7] ISICO Italian Sci Spine Inst, Phys & Rehabil Med, Milan, Italy
[8] Harvard Med Sch, Boston Childrens Hosp, Orthopaed Surg, Boston, MA 02115 USA
[9] Univ Med Sci, Dept Spine Disorders & Pediat Orthoped, Poznan, Poland
[10] Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB, Canada
[11] Univ Alberta, Dept Surg, Edmonton, AB, Canada
[12] Univ Alberta, Dept Biomed Engn, Edmonton, AB, Canada
[13] Univ Alberta, Dept Pediat Radiol, Edmonton, AB, Canada
[14] Univ Alberta, Dept Diagnost Imaging, Edmonton, AB, Canada
[15] Saitama Prefectural Rehabil Ctr, Ageo, Saitama, Japan
[16] Univ Alberta, Dept Phys Therapy, Edmonton, AB, Canada
[17] Inst Elena Salva, Spinal Deform Rehabil Ctr, Barcelona, Spain
[18] Childrens Hosp Wisconsin, Pediat Orthopaed Surg, Milwaukee, WI 53201 USA
[19] Med Coll Wisconsin, Dept Orthopaed Surg, 8700 W Wisconsin Ave, Milwaukee, WI 53226 USA
[20] Hong Kong Polytech Univ, Dept Biomed Engn, Hong Kong, Peoples R China
[21] ISICO Italian Sci Spine Inst, Milan, Italy