1. South Western Sydney Local Health District, 59a Cumberland Road, Ingleburn, NSW 2565, Australia
2. Centre for Cardiovascular and Chronic Care, Faculty of Health, University of Technology, Sydney, P.O. Box 123, Broadway, NSW 2007, Australia
3. Centre for Applied Nursing Research, School of Nursing and Midwifery, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia
4. Ingham Institute for Applied Medical Research, 1 Campbell Street, Liverpool, NSW 2170, Australia
5. School of Nursing, John Hopkins University, 525 North Wolfe Street, Baltimore, MD 21205, USA