1 Center for Health Economics Research Hannover (CHERH), Gottfried Wilhelm Leibniz Universität Hannover, Otto-Brenner-Str. 1, 30159, Hannover, Germany. sn@cherh.de.
2 Center for Health Economics Research Hannover (CHERH), Gottfried Wilhelm Leibniz Universität Hannover, Otto-Brenner-Str. 1, 30159, Hannover, Germany.