Dural Tears in Adult Deformity Surgery: Incidence, Risk Factors, and Outcomes- Sravisht Iyer, Eric O Klineberg, Lukas P Zebala, Michael P Kelly, Robert A Hart, Munish C Gupta, D Kojo Hamilton, Gregory M Mundis, Daniel Sciubba, Christopher P Ames, Justin S Smith, Virginie Lafage, Douglas Burton, Han Jo Kim, International Spine Study Group (ISSG)