1. Occupational and Aviation Medicine Unit; University of Otago Wellington; Wellington New Zealand
2. Department of Emergency Medicine; Wellington Regional Hospital; Wellington New Zealand
3. Biostatistical Consulting Group; University of Otago Wellington; Wellington New Zealand
4. Department of Intensive Care Medicine; Wellington Regional Hospital; Wellington New Zealand
5. University of Otago Wellington; Wellington New Zealand
6. Intensive Care Unit; Wellington Regional Hospital; Wellington New Zealand
7. Anesthesia and Intensive Care Medicine; Aeromedical Section; University Hospital of Umeå; Umeå University; Umeå Sweden