[1] Univ Edinburgh, Dept Orthopaed, Trauma & Orthopaed, Edinburgh, Midlothian, Scotland
[2] NHS Publ Hlth Scotland, Scottish Arthroplasty Project, Edinburgh, Midlothian, Scotland
[3] Victoria Hosp, Dept Trauma & Orthopaed Surg, Kirkcaldy, Scotland
[4] Univ Edinburgh, Dept Orthopaed, Edinburgh, Midlothian, Scotland
[5] Royal Infirm Edinburgh NHS Trust, Dept Trauma & Orthopaed, Edinburgh, Midlothian, Scotland
[6] Golden Jubilee Natl Hosp, Clydebank, Scotland
[7] Univ Edinburgh, Dept Orthopaed, Orthopaed, Edinburgh, Midlothian, Scotland