, Avery E. Brown1, Cole A. Bortz1, Haddy Alas1, Lara Passfall1, Oscar Krol1, Nicholas Kummer1, Renaud Lafage2, Dean Chou3, Douglas C. Burton4, Breton Line5, Eric Klineberg6, Robert Hart7, Jeffrey Gum8, Alan Daniels9, Kojo Hamilton10, Shay Bess11, Themistocles Protopsaltis12, Christopher Shaffrey13, Frank A. Schwab2, Justin S. Smith14, Virginie Lafage2, Christopher Ames3, on behalf of the International Spine Study Group (ISSG)1Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/