[1] NeuroSpine Surg Res Grp NSURG, Sydney, NSW 2000, Australia
[2] Prince Wales Private Hosp, Neuro Spine Clin, Randwick, NSW 2031, Australia
[3] Univ New South Wales UNSW, Fac Med, Sydney, NSW 2000, Australia
[4] Univ New South Wales, Fac Med, Prince Wales Clin Sch, Surg & Orthopaed Res Labs SORL, Randwick, NSW 2031, Australia
[5] 3DMorphic Pty Ltd, Matraville 2036, Australia