1. Self-reported health in the Republica of Karelia, Russia and in North Karelia, Finland in 1992
2. Needs for further improvement: risk adjustment in the German health insurance system
3. K. Zok , “Immer mehr Versicherte wollen wechseln,”Gesundheit und Gesellschaft6, no. 9 ( 2003 ): 38 –41.
4. R. Busse , “New German Health Reform Act Passes,”Euro Observer2, no. 1 ( 2000 ): 3 .
5. K.H. Schönbach , “Disease-Management-Programme im Risikostrukturausgleich der gesetzlichen Krankenversicherung,”Die BKK89, no. 7 ( 2001 ): 311 –316;