1 AUT University, Health and Rehabilitation Research Institute and Department of Podiatry, Auckland, New Zealand. krome@aut.ac.nz.
2 Bone and Joint Research Group, Department of Medicine, University of Auckland; and Auckland District Health Board, Rheumatology Department, Greenlane Hospital, New Zealand.
3 Department of Medicine, Faculty of Medical and Health Sciences, The University of Auckland; and Department of Dermatology, Counties Manukau District Health Board, Middlemore Hospital, Auckland, New Zealand.
4 Department of Rheumatology, Counties Manukau District Health Board, Middlemore Hospital, Auckland, New Zealand.
5 AUT University, Health and Rehabilitation Research Institute and Department of Podiatry, Auckland, New Zealand.