[1] Department of Orthopaedic Surgery, University of Aberdeen, United Kingdom
[2] Department of Human Genetics, University of Aberdeen, United Kingdom
[3] Department of Orthopaedic Surgery, Univ. of Aberdeen Medical School, United Kingdom
[4] Department of Orthopaedic Surgery, Univ. of Aberdeen Medical School, Polwarth Building, Foresterhill, Aberdeen AB25 2ZD, United Kingdom