[1] Univ Auckland, Bone & Joint Res Grp, Auckland 1, New Zealand
[2] Univ Minho, Res Grp 3Bs, Braga, Portugal
[3] PT Govt Associate Lab, ICVS 3Bs, Braga, Portugal
[4] Univ Auckland, Dept Surg, Auckland 1, New Zealand
[5] Auckland Dist Hlth Board, Dept Orthopaed Surg, Auckland, New Zealand