[35] W. Nonneman and E. van Doorslaer, The role of the sickness funds in the Belgian health care market., Social science & medicine (1982), vol. 39, no. 10, pp. 1483-1495, Nov. 1994.
[32] M. Lisac, L. Reimers, K.-D. Henke, and S. Schlette, Access and choice-competition under the roof of solidarity in German health care: an analysis of health policy reforms since 2004., Health economics, policy, and law, vol.