1. Christchurch Cardioendocrine Research Group, Department of Medicine, University of Otago, Christchurch, PO Box 4345, Christchurch 8140, New Zealand.
2. Christchurch Cardioendocrine Research Group, Department of Medicine, University of Otago, Christchurch, PO Box 4345, Christchurch 8140, New Zealand
3. Molecular Pathology Laboratory, Canterbury District Health Board, Christchurch, New Zealand
4. Department of Medicine, Faculty of Medicine & Health Sciences, University of Auckland, Auckland, New Zealand
5. Department of Medical Imaging, Unitec Institute of Technology, Auckland, New Zealand