1. 1. Wilkinson RG, Marmot MG, World Health Organization. Centre for Urban Health et al (2003): The solid facts: social determinants of health. World Health Organization, Regional Office for Europe, Copenhagen
2. 2. Berkman LF, Kawachi Io (2000): Social epidemiology. Oxford University Press, Oxford, New York
3. 3. Great Britain. Working Group on Inequalities in Health., Black D, Townsend P et al (1980): Inequalities in health: the Black report. Penguin Books, Harmondsworth
4. 4. Fujino Y, Tamakoshi A, Iso H et al (2005): A nationwide cohort study of educational background and major causes of death among the elderly population in Japan. Prev Med 40: 444-451
5. 5. Fukuda Y, Nakao H, Yahata Y et al (2007): Are health inequalities increasing in Japan? The trends of 1955 to 2000. Biosci Trends 1: 38-42