Rod fractures and nonunions after long fusion to the sacrum for primary presentation adult spinal deformity: a comparison with and without interbody fusion in the distal lumbar spine

Mostafa El Dafrawy, Keith Bridwell, Owoicho Adogwa, Max Shlykov, Jonathan Koscso, Lawrence G. Lenke, Thamrong Lertudomphonwanit, Michael P. Kelly, Munish Gupta