title: Early lateral migration of head after bipolar hemiarthoplasty in a cerebral palsy patient.
authors.affiliation: Department of Orthopaedic Surgery, Saka General Hospital, Miyagi, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Hiragami
authors.forename: Arata
authors.initials: A
authors.lastname: Mukohyama
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Maruyama