1. Department of Nursing; Deakin University and Southern Health Nursing Research Centre; Melbourne; Vic.; Australia
2. Department of Nutrition and Dietetics; School of Medicine; Flinders University of South Australia; Adelaide; SA; Australia
3. Department of Epidemiology and Biostatistics; School of Medicine; Flinders University of South Australia; Adelaide; Vic.; Australia
4. Flinders Medical Centre; Adelaide; SA; Australia