1. Dunedin Hospital; Department of Orthopaedics; Private Bag 1921 Dunedin Otago New Zealand
2. Dunedin School of Medicine; Department of Medical and Surgical Sciences; University of Otago PO Box 913 Dunedin New Zealand
3. Dunedin School of Medicine, University of Otago; Department of Preventive & Social Medicine; PO Box 913 Dunedin New Zealand 9054