1. Rehabilitation Teaching and Research Unit, University of Otago, Wellington, New Zealand,
2. Burwood Academy of Independent Living, Allan Bean Centre, Christchurch, New Zealand,
3. Department of Psychological Medicine, University of Otago, Christchurch, New Zealand,
4. Centre for Post-Acute Innovation and Research, MedStar National Rehabilitation Hospital and MedStar Health Research Institute, Washington, DC, USA, and
5. Department of Rehabilitation Medicine, Georgetown University School of Medicine, Washington, DC, USA