title: The Heffington frame.
authors.forename: D R
authors.initials: DR
authors.lastname: Lange
mesh_terms: D006470:Hemorrhage / Q000517:prevention & control*; D006801:Humans; D008159:Lumbar Vertebrae / Q000601:surgery*; D011183:Postoperative Complications / Q000517:prevention & control*; D011187:Posture; D012307:Risk Factors