1. Pain Management Research Institute, Kolling Institute of Medical Research, Northern Sydney Local Health District; St Leonards New South Wales 2065 Australia
2. Sydney Medical School Northern, University of Sydney; New South Wales 2006 Australia
3. Michael J Cousins Pain Management and Research Centre, Royal North Shore Hospital, Northern Sydney Local Health District; St Leonards New South Wales 2065 Australia
4. Department of Pain Management; HammondCare, Greenwich Hospital; Greenwich New South Wales 2065 Australia
5. Kolling Institute of Medical Research, Northern Sydney Local Health District; St Leonards New South Wales 2065 Australia
6. School of Psychology, University of New South Wales; New South Wales 2052 Australia
7. Neuroscience Research Australia; New South Wales 2031 Australia