title: Letter of apology: Risk factors affecting the outcome of metal-on-metal surface arthroplasty of the hip.
authors.forename: Paul E
authors.initials: PE
authors.lastname: Beaulé
authors.forename: Harlan C
authors.initials: HC
authors.lastname: Amstutz
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001696:Biomechanical Phenomena; D005269:Femur / Q000502:physiology; D006622:Hip Prosthesis; D006801:Humans; D011474:Prosthesis Design