1. Department of Anatomy and Medical Imaging School of Medical Sciences, The University of Auckland Auckland New Zealand
2. Pacific Radiology Group Wellington and Manawatu New Zealand
3. Pacific Radiology Group Wanaka New Zealand
4. Section of Epidemiology and Biostatistics School of Population Health, The University of Auckland Auckland New Zealand
5. Department of Medical Imaging and Radiation Sciences School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Sciences, Monash University Clayton Victoria Australia