title: Spinal pedicle fixation: reliability and validity of roentgenogram-based assessment and surgical factors on successful screw placement.
authors.forename: D
authors.initials: D
authors.lastname: Grob
authors.forename: F
authors.initials: F
authors.lastname: Magerl
authors.forename: D P
authors.initials: DP
authors.lastname: McGowan
mesh_terms: D001863:Bone Screws; D006801:Humans; D013123:Spinal Fusion