1. Academic Unit for Economics, School of Economics and Business, University of Ljubljana, Ljubljana, Slovenia
2. Department for Development and Analysis, The Health Insurance Institute of Slovenia, Ljubljana, Slovenia
3. Department for Development and Analysis, The Health Insurance Institute of Slovenia, Ljubljana, Slovenia and Department of Internal Medicine, General Hospital Jesenice, Jesenice, Slovenia
4. Academic Unit for Mathematics, Statistics and Operations Research, School of Economics and Business, University of Ljubljana, Ljubljana, Slovenia