title: Authors' reply to Cobb.
authors.affiliation: Department of Orthopaedics and Trauma, University of Edinburgh, Edinburgh EH16 4SB, UK.
authors.forename: Colin R
authors.initials: CR
authors.lastname: Howie
authors.forename: David F
authors.initials: DF
authors.lastname: Hamilton
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D011475:Prosthesis Failure