Hill Sarah, Blakely Tony, Kawachi Ichiro, Woodward Alistair
Department of Public Health, Wellington School of Medicine and Health Sciences, PO Box 7343, Wellington South, New Zealand.
BMJ. 2004 Apr 24;328(7446):988-9. doi: 10.1136/bmj.38070.503009.EE. Epub 2004 Apr 5.