Acknowledgments
This work was supported by a grant from the Ford Foundation to Deakin University (Grant No. 1010-1173). Daniel Reidpath was supported by a Senior Research Fellowship from the Victorian Health Promotion Foundation. Many people have contributed to the work. In particular, we would like to thank: Bianca Brijnath, Monica Barratt, Lisa Messersmith, Eve Lee, our collaborators, and those who supported them. Anomymous reviewers have contributed generously and thoughtfully to the contents. Dr Joe Thomas was a principal investigator of the project from May 2001 to March 2003.