†Sleep/Wake Research Centre, Department of Public Health
‡Department of Public Health, Wellington School of Medicine and Health Sciences, Wellington South, New Zealand
☆ Funds were received from The Wellington Surgical Research Trust, Wellington, New Zealand, in support of the research material described in this article.
☆☆ Reprint requests: Jann M. Fielden, RCpN, MA, Department of Surgery & Cancer Services, Wellington School of Medicine & Health Sciences, PO Box 7343, Wellington South, New Zealand.