[1] AUT Univ, Hlth & Rehabil Res Inst, Auckland, New Zealand
[2] AUT Univ, Dept Podiatry, Auckland, New Zealand
[3] Univ Auckland, Dept Med, Bone & Joint Res Grp, Auckland, New Zealand
[4] Greenlane Hosp, Rheumatol Dept, Auckland Dist Hlth Board, Auckland, New Zealand
[5] Univ Auckland, Fac Med & Hlth Sci, Dept Med, Auckland, New Zealand
[6] Middlemore Hosp, Counties Manukau Dist Hlth Board, Dept Dermatol, Auckland, New Zealand
[7] Middlemore Hosp, Counties Manukau Dist Hlth Board, Dept Rheumatol, Auckland, New Zealand