1. Primary Healthcare Research and Development Institute, Community Health Centre Ljubljana, Metelkova ulica 9, SI-1000 Ljubljana, Slovenia
2. Department of Family Medicine, Faculty of Medicine, University of Maribor, Taborska ulica 8, SI-2000 Maribor, Slovenia
3. Community Health Centre Slovenj Gradec, Partizanska 16, SI-2380 Slovenj Gradec, Slovenia
4. Institute for Biostatistics and Medical Informatics, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, SI-1000 Ljubljana, Slovenia
5. Department of Family Medicine, Faculty of Medicine, University of Ljubljana, Poljanski nasip 58, SI-1000 Ljubljana, Slovenia