1. Ljubljana Community Health Centre, Primary Healthcare Research and Development Institute , Metelkova 9, 1000 Ljubljana , Slovenia
2. University of Ljubljana, Faculty of Medicine, Department of Family Medicine , Poljanski nasip 58, 1000 Ljubljana , Slovenia
3. University of Maribor, Faculty of Medicine, Department of Family Medicine , Taborska 8, 2000 Maribor , Slovenia
4. Institute for Economic Research , Kardeljeva ploščad 17, 1000 Ljubljana , Slovenia