1. What it is, what it does;WHO,1988
2. The global burden of disease: a comprehensive assessment of mortality and disability from diseases, injuries and risk factors in 1990 and projected to 2020,1996
3. The world health report 2003 – shaping the future,2003
4. The World Health Organization's global initiative on neurology and public health;Janca;J Neurol Sci,1997
5. Neurology and public health: strategy and perspectives;Aarli;J Neurol Sci,1997