title: Erratum to: CT accuracy of percutaneous versus open pedicle screw techniques: a series of 1609 screws.
authors.affiliation: Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO, USA.
authors.forename: Todd M
authors.initials: TM
authors.lastname: Chapman
authors.affiliation: Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA. daniel.blizzard@duke.edu.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Blizzard
authors.affiliation: Department of Physical and Occupational Therapy, Duke University Health System, Durham, NC, USA.
authors.forename: Charles
authors.initials: C
authors.lastname: Sheets
authors.affiliation: Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA.
authors.forename: Christopher R
authors.initials: CR
authors.lastname: Brown