title: The zero projection.
authors.affiliation: Royal National Orthopaedic Hospital, London.
authors.forename: D
authors.initials: D
authors.lastname: Horsfield
authors.forename: R R
authors.initials: RR
authors.lastname: Phillips
mesh_terms: D001175:Arthrography / Q000379:methods; D006801:Humans; D011187:Posture; D012008:Recurrence; D012783:Shoulder Dislocation / Q000000981:diagnostic imaging*