Correction: Degenerative lumbar spondylolisthesis: review of current classifications and proposal of a novel classification system

Affiliations

• ¹ School of Medicine, University of California, San Francisco, San Francisco, CA, USA.
• ² Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA, USA.
• ³ Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA.
• ⁴ Department of Orthopaedic Spine Surgery, Stanford University, Redwood City, California, USA.
• ⁵ Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA, USA. Sigurd.Berven@ucsf.edu.